Nessus

In Tenable Nessus versions prior to 10.8.5 on a Windows host, it was found that a non-administrative user could overwrite arbitrary local system files with log content at SYSTEM privilege.

Published: 2025-07-01T23:11:13.818Z
Updated: 2025-07-02T13:24:24.991Z

In Nessus versions prior to 10.8.4, a non-authenticated attacker could alter Nessus logging entries by manipulating http requests to the application.

Published: 2025-04-18T19:17:30.612Z
Updated: 2025-04-18T19:40:24.201Z

When installing Nessus to a non-default location on a Windows host, Nessus versions prior to 10.8.4 did not enforce secure permissions for sub-directories. This could allow for local privilege escalation if users had not secured the directories in the non-default installation location. - CVE-2025-24914

Published: 2025-04-18T18:18:02.729Z
Updated: 2026-02-26T18:28:09.421Z

A race condition vulnerability exists where an authenticated, local attacker on a Windows Nessus host could modify installation parameters at installation time, which could lead to the execution of arbitrary code on the Nessus host

Published: 2024-05-17T16:54:55.570Z
Updated: 2024-08-01T20:05:08.393Z

When installing Nessus to a directory outside of the default location on a Windows host, Nessus versions prior to 10.7.3 did not enforce secure permissions for sub-directories. This could allow for local privilege escalation if users had not secured the directories in the non-default installation location.

Published: 2024-05-17T16:50:48.745Z
Updated: 2024-08-01T20:05:08.242Z

As a part of Tenable’s vulnerability disclosure program, a vulnerability in a Nessus plugin was identified and reported. This vulnerability could allow a malicious actor with sufficient permissions on a scan target to place a binary in a specific filesystem location, and abuse the impacted plugin in order to escalate privileges.

Published: 2024-03-18T15:37:44.698Z
Updated: 2024-08-21T14:42:09.885Z

A SQL injection vulnerability exists where an authenticated, low-privileged remote attacker could potentially alter scan DB content.

Published: 2024-02-06T23:38:32.704Z
Updated: 2024-08-01T18:26:30.266Z

A stored XSS vulnerability exists where an authenticated, remote attacker with administrator privileges on the Nessus application could alter Nessus proxy settings, which could lead to the execution of remote arbitrary scripts.

Published: 2024-02-06T23:34:19.528Z
Updated: 2024-08-01T18:26:29.995Z

An arbitrary file write vulnerability exists where an authenticated attacker with privileges on the managing application could alter Nessus Rules variables to overwrite arbitrary files on the remote host, which could lead to a denial of service condition.

Published: 2023-11-20T20:35:55.499Z
Updated: 2024-08-02T08:21:17.809Z

An arbitrary file write vulnerability exists where an authenticated, remote attacker with administrator privileges on the Nessus application could alter Nessus Rules variables to overwrite arbitrary files on the remote host, which could lead to a denial of service condition.

Published: 2023-11-20T20:20:04.927Z
Updated: 2024-12-02T20:52:31.935Z

Under certain conditions, a low privileged attacker could load a specially crafted file during installation or upgrade to escalate privileges on Windows and Linux hosts.

Published: 2023-11-01T15:30:55.181Z
Updated: 2024-09-05T19:40:22.479Z

An improper authorization vulnerability exists where an authenticated, low privileged remote attacker could view a list of all the users available in the application.

Published: 2023-08-29T19:08:29.434Z
Updated: 2024-10-28T18:59:10.910Z

An arbitrary file write vulnerability exists where an authenticated, remote attacker with administrator privileges could alter logging variables to overwrite arbitrary files on the remote host with log data, which could lead to a denial of service condition.

Published: 2023-08-29T18:55:09.869Z
Updated: 2024-10-28T18:46:39.141Z

A pass-back vulnerability exists where an authenticated, remote attacker with administrator privileges could uncover stored SMTP credentials within the Nessus application.This issue affects Nessus: before 10.6.0.

Published: 2023-08-29T18:38:11.935Z
Updated: 2024-09-30T15:49:08.054Z

Vulnerability in Tenable Tenable.Io, Tenable Nessus, Tenable Security Center.This issue affects Tenable.Io: before Plugin Feed ID #202306261202 ; Nessus: before Plugin Feed ID #202306261202 ; Security Center: before Plugin Feed ID #202306261202 . This vulnerability could allow a malicious actor with sufficient permissions on a scan target to place a binary in a specific filesystem location, and abuse the impacted plugin in order to escalate privileges.

Published: 2023-06-26T17:39:56.554Z
Updated: 2024-12-03T18:44:10.535Z

A privilege escalation vulnerability was identified in Nessus versions 8.10.1 through 8.15.8 and 10.0.0 through 10.4.1. An authenticated attacker could potentially execute a specially crafted file to obtain root or NT AUTHORITY / SYSTEM privileges on the Nessus host.

Published: 2023-01-20T00:00:00.000Z
Updated: 2025-04-02T14:39:20.322Z

A vulnerability was reported where through modifying the scan variables, an authenticated user in Tenable products, that has Scan Policy Configuration roles, could manipulate audit policy variables to execute arbitrary commands on credentialed scan targets.

Published: 2023-03-15T00:00:00.000Z
Updated: 2025-02-27T18:35:57.540Z

An authenticated attacker could utilize the identical agent and cluster node linking keys to potentially allow for a scenario where unauthorized disclosure of agent logs and data is present.

Published: 2022-10-31T00:00:00.000Z
Updated: 2025-05-05T14:19:19.466Z

An authenticated attacker could read Nessus Debug Log file attachments from the web UI without having the correct privileges to do so. This may lead to the disclosure of information on the scan target and/or the Nessus scan to unauthorized parties able to reach the Nessus instance.

Published: 2022-10-24T21:12:00.000Z
Updated: 2025-05-07T14:06:42.806Z

An authenticated attacker could read arbitrary files from the underlying operating system of the scanner using a custom crafted compliance audit file without providing any valid SSH credentials.

Published: 2022-06-21T14:23:31.000Z
Updated: 2024-08-03T07:54:03.398Z

An authenticated attacker could create an audit file that bypasses PowerShell cmdlet checks and executes commands with administrator privileges.

Published: 2022-06-21T14:23:30.000Z
Updated: 2024-08-03T07:54:03.459Z

Insufficiently Protected Credentials: An authenticated user with debug privileges can retrieve stored Nessus policy credentials from the “nessusd” process in cleartext via process dumping. The affected products are all versions of Nessus Essentials and Professional. The vulnerability allows an attacker to access credentials stored in Nessus scanners, potentially compromising its customers’ network of assets.

Published: 2022-10-17T00:00:00.000Z
Updated: 2025-05-13T19:57:34.629Z

Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function.

Published: 2022-01-26T18:02:02.000Z
Updated: 2025-05-05T16:24:50.854Z

Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES.

Published: 2022-01-24T01:06:50.000Z
Updated: 2025-05-05T16:25:00.235Z

storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

Published: 2022-01-08T02:56:30.000Z
Updated: 2025-05-05T16:28:54.738Z

nextScaffoldPart in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

Published: 2022-01-08T02:56:39.000Z
Updated: 2025-05-05T16:29:03.187Z

lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

Published: 2022-01-08T02:56:48.000Z
Updated: 2025-05-05T16:29:13.176Z

defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

Published: 2022-01-08T02:56:58.000Z
Updated: 2025-05-05T16:29:22.116Z

build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

Published: 2022-01-08T02:57:07.000Z
Updated: 2025-05-05T16:29:31.599Z

addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

Published: 2022-01-08T02:57:15.000Z
Updated: 2025-05-05T16:29:41.855Z

The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc).

Published: 2022-03-15T17:05:20.382Z
Updated: 2026-05-22T13:28:08.544Z

In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

Published: 2022-01-06T03:48:26.000Z
Updated: 2025-05-05T16:44:58.649Z

In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).

Published: 2022-01-01T18:47:46.000Z
Updated: 2025-05-05T16:45:11.487Z

The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j).

Published: 2021-03-25T14:25:14.287Z
Updated: 2024-09-17T03:07:10.879Z

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).

Published: 2021-03-25T14:25:13.659Z
Updated: 2024-09-17T03:43:55.497Z

Nessus versions 8.15.2 and earlier were found to contain a local privilege escalation vulnerability which could allow an authenticated, local administrator to run specific executables on the Nessus Agent host. Tenable has included a fix for this issue in Nessus 10.0.0. The installation files can be obtained from the Tenable Downloads Portal (https://www.tenable.com/downloads/nessus).

Published: 2021-11-02T23:24:28.000Z
Updated: 2024-08-03T17:30:07.575Z

Nessus Agent versions 8.2.5 and earlier were found to contain a privilege escalation vulnerability which could allow a Nessus administrator user to upload a specially crafted file that could lead to gaining administrator privileges on the Nessus host.

Published: 2021-07-21T10:20:42.000Z
Updated: 2024-08-03T17:30:07.478Z

Nessus Agent 8.2.4 and earlier for Windows were found to contain multiple local privilege escalation vulnerabilities which could allow an authenticated, local administrator to run specific Windows executables as the Nessus host. This is different than CVE-2021-20099.

Published: 2021-06-28T10:29:19.000Z
Updated: 2024-08-03T17:30:07.663Z

Nessus Agent 8.2.4 and earlier for Windows were found to contain multiple local privilege escalation vulnerabilities which could allow an authenticated, local administrator to run specific Windows executables as the Nessus host. This is different than CVE-2021-20100.

Published: 2021-06-28T10:29:13.000Z
Updated: 2024-08-03T17:30:07.420Z

Nessus versions 8.13.2 and earlier were found to contain a privilege escalation vulnerability which could allow a Nessus administrator user to upload a specially crafted file that could lead to gaining administrator privileges on the Nessus host.

Published: 2021-06-29T18:16:35.000Z
Updated: 2024-08-03T17:30:07.345Z

A vulnerability in Nessus versions 8.9.0 through 8.12.0 for Windows & Nessus Agent 8.0.0 and 8.1.0 for Windows could allow an authenticated local attacker to copy user-supplied files to a specially constructed path in a specifically named user directory. An attacker could exploit this vulnerability by creating a malicious file and copying the file to a system directory. The attacker needs valid credentials on the Windows system to exploit this vulnerability.

Published: 2020-11-05T19:11:24.000Z
Updated: 2024-08-04T08:39:26.035Z

Nessus versions 8.11.0 and earlier were found to maintain sessions longer than the permitted period in certain scenarios. The lack of proper session expiration could allow attackers with local access to login into an existing browser session.

Published: 2020-08-21T12:23:40.000Z
Updated: 2024-08-04T08:39:25.874Z

Nessus 8.10.0 and earlier were found to contain a Stored XSS vulnerability due to improper validation of input during scan configuration. An authenticated, remote attacker could potentially exploit this vulnerability to execute arbitrary code in a user's session. Tenable has implemented additional input validation mechanisms to correct this issue in Nessus 8.11.0.

Published: 2020-07-15T12:18:30.000Z
Updated: 2024-08-04T08:39:25.924Z

Nessus versions 8.6.0 and earlier were found to contain a Denial of Service vulnerability due to improper validation of specific imported scan types. An authenticated, remote attacker could potentially exploit this vulnerability to cause a Nessus scanner to become temporarily unresponsive.

Published: 2019-10-23T18:55:07.000Z
Updated: 2024-08-04T19:26:27.847Z

Nessus 8.5.2 and earlier on Windows platforms were found to contain an issue where certain system files could be overwritten arbitrarily, potentially creating a denial of service condition.

Published: 2019-08-15T18:58:14.000Z
Updated: 2024-08-04T19:26:27.647Z

Content Injection vulnerability in Tenable Nessus prior to 8.5.0 may allow an authenticated, local attacker to exploit this vulnerability by convincing another targeted Nessus user to view a malicious URL and use Nessus to send fraudulent messages. Successful exploitation could allow the authenticated adversary to inject arbitrary text into the feed status, which will remain saved post session expiration.

Published: 2019-07-01T19:39:06.000Z
Updated: 2024-08-04T19:26:27.620Z

Nessus versions 8.4.0 and earlier were found to contain a reflected XSS vulnerability due to improper validation of user-supplied input. An unauthenticated, remote attacker could potentially exploit this vulnerability via a specially crafted request to execute arbitrary script code in a users browser session.

Published: 2019-06-25T20:27:56.000Z
Updated: 2024-08-04T19:26:27.660Z

Nessus versions 8.2.1 and earlier were found to contain a stored XSS vulnerability due to improper validation of user-supplied input. An authenticated, remote attacker could potentially exploit this vulnerability via a specially crafted request to execute arbitrary script code in a user's browser session. Tenable has released Nessus 8.2.2 to address this issue.

Published: 2019-02-12T04:00:00.000Z
Updated: 2024-09-17T02:10:57.993Z

If an application encounters a fatal protocol error and then calls SSL_shutdown() twice (once to send a close_notify, and once to receive one) then OpenSSL can respond differently to the calling application if a 0 byte record is received with invalid padding compared to if a 0 byte record is received with an invalid MAC. If the application then behaves differently based on that in a way that is detectable to the remote peer, then this amounts to a padding oracle that could be used to decrypt data. In order for this to be exploitable "non-stitched" ciphersuites must be in use. Stitched ciphersuites are optimised implementations of certain commonly used ciphersuites. Also the application must call SSL_shutdown() twice even if a protocol error has occurred (applications should not do this but some do anyway). Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q).

Published: 2019-02-27T23:00:00.000Z
Updated: 2024-09-17T04:20:35.057Z

Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.

Published: 2018-11-15T21:00:00.000Z
Updated: 2024-08-05T05:33:44.232Z

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

Published: 2019-06-24T16:06:38.000Z
Updated: 2025-05-30T19:39:20.442Z

In Nessus before 7.1.0, Session Fixation exists due to insufficient session management within the application. An authenticated attacker could maintain system access due to session fixation after a user password change.

Published: 2018-05-18T22:00:00.000Z
Updated: 2024-09-17T04:09:03.404Z

In Nessus before 7.1.0, a XSS vulnerability exists due to improper input validation. A remote authenticated attacker could create and upload a .nessus file, which may be viewed by an administrator allowing for the execution of arbitrary script code in a user's browser session. In other scenarios, XSS could also occur by altering variables from the Advanced Settings.

Published: 2018-05-18T22:00:00.000Z
Updated: 2024-09-16T22:09:28.813Z

When installing Nessus to a directory outside of the default location, Nessus versions prior to 7.0.3 did not enforce secure permissions for sub-directories. This could allow for local privilege escalation if users had not secured the directories in the installation location.

Published: 2018-03-20T18:00:00.000Z
Updated: 2024-09-16T17:58:22.224Z

Tenable Nessus before 6.10.2 (as used alone or in Tenable Appliance before 4.5.0) was found to contain a flaw that allowed a remote, authenticated attacker to upload a crafted file that could be written to anywhere on the system. This could be used to subsequently gain elevated privileges on the system (e.g., after a reboot). This issue only affects installations on Windows.

Published: 2017-03-08T23:00:00.000Z
Updated: 2024-08-05T15:33:20.378Z

Cross-site scripting (XSS) vulnerability in Tenable Nessus before 6.9.3 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.

Published: 2017-01-05T22:00:00.000Z
Updated: 2024-08-05T14:55:35.446Z

The moment module before 2.19.3 for Node.js is prone to a regular expression denial of service via a crafted date string, a different vulnerability than CVE-2016-4055.

Published: 2018-03-04T21:00:00.000Z
Updated: 2024-08-05T21:13:49.174Z

When linking a Nessus scanner or agent to Tenable.io or other manager, Nessus 6.x before 6.11 does not verify the manager's TLS certificate when making the initial outgoing connection. This could allow man-in-the-middle attacks.

Published: 2017-08-09T12:00:00.000Z
Updated: 2024-09-17T03:34:29.415Z

Cross-site scripting (XSS) vulnerability in Tenable Nessus before 6.9 allows remote authenticated users to inject arbitrary web script or HTML via vectors related to handling of .nessus files.

Published: 2017-01-31T22:00:00.000Z
Updated: 2024-08-06T02:42:11.237Z

The duration function in the moment package before 2.11.2 for Node.js allows remote attackers to cause a denial of service (CPU consumption) via a long string, aka a "regular expression Denial of Service (ReDoS)."

Published: 2017-01-23T21:00:00.000Z
Updated: 2024-08-06T00:17:30.673Z

Tenable Nessus before 6.8 has a stored XSS issue that requires admin-level authentication to the Nessus UI, and would potentially impact other admins (Tenable IDs 5218 and 5269).

Published: 2019-12-27T14:24:40.000Z
Updated: 2024-08-06T03:47:35.009Z

Tenable Nessus before 6.8 has a stored XSS issue that requires admin-level authentication to the Nessus UI, and would only potentially impact other admins. (Tenable ID 5198).

Published: 2019-12-27T14:19:43.000Z
Updated: 2024-08-06T03:47:34.987Z