Zimbra Collaboration 9.0.0

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1. A Reflected Cross-Site Scripting (XSS) vulnerability exists in the /h/rest endpoint, allowing authenticated attackers to inject and execute arbitrary JavaScript in a victim's session. Exploitation requires a valid auth token and involves a crafted URL with manipulated query parameters that triggers XSS when accessed by a victim.

Published: 2025-03-12T00:00:00.000Z
Updated: 2025-03-12T15:44:52.702Z

The postjournal service in Zimbra Collaboration (ZCS) before 8.8.15 Patch 46, 9 before 9.0.0 Patch 41, 10 before 10.0.9, and 10.1 before 10.1.1 sometimes allows unauthenticated users to execute commands.

Published: 2024-10-02T00:00:00.000Z
Updated: 2026-02-03T19:27:04.871Z

An issue was discovered in Zimbra Collaboration (ZCS) 10.1.x before 10.1.1, 10.0.x before 10.0.9, 9.0.0 before Patch 41, and 8.8.15 before Patch 46. It allows authenticated users to exploit Server-Side Request Forgery (SSRF) due to improper input sanitization and misconfigured domain whitelisting. This issue permits unauthorized HTTP requests to be sent to internal services, which can lead to Remote Code Execution (RCE) by chaining Command Injection within the internal service. When combined with existing XSS vulnerabilities, this SSRF issue can further facilitate Remote Code Execution (RCE).

Published: 2024-10-22T00:00:00.000Z
Updated: 2024-10-22T18:10:41.843Z

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The vulnerability occurs due to inadequate input validation of the res parameter, allowing an authenticated attacker to inject and execute arbitrary JavaScript code within the context of another user's browser session. By uploading a malicious JavaScript file, accessible externally, and crafting a URL containing its location in the res parameter, the attacker can exploit this vulnerability. Subsequently, when another user visits the crafted URL, the malicious JavaScript code is executed.

Published: 2024-08-12T00:00:00.000Z
Updated: 2025-03-25T16:10:43.367Z

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The vulnerability involves unauthenticated local file inclusion (LFI) in a web application, specifically impacting the handling of the packages parameter. Attackers can exploit this flaw to include arbitrary local files without authentication, potentially leading to unauthorized access to sensitive information. The vulnerability is limited to files within a specific directory.

Published: 2024-08-12T00:00:00.000Z
Updated: 2025-03-19T15:58:06.291Z

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0, issue 1 of 2. A reflected cross-site scripting (XSS) vulnerability has been identified in the Zimbra webmail admin interface. This vulnerability occurs due to inadequate input validation of the packages parameter, allowing an authenticated attacker to inject and execute arbitrary JavaScript code within the context of another user's browser session. By uploading a malicious JavaScript file and crafting a URL containing its location in the packages parameter, the attacker can exploit this vulnerability. Subsequently, when another user visits the crafted URL, the malicious JavaScript code is executed.

Published: 2024-08-12T00:00:00.000Z
Updated: 2025-03-13T20:12:37.623Z

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. A Cross-Site Scripting (XSS) vulnerability exists in the CalendarInvite feature of the Zimbra webmail classic user interface, because of improper input validation in the handling of the calendar header. An attacker can exploit this via an email message containing a crafted calendar header with an embedded XSS payload. When a victim views this message in the Zimbra webmail classic interface, the payload is executed in the context of the victim's session, potentially leading to execution of arbitrary JavaScript code.

Published: 2024-08-12T00:00:00.000Z
Updated: 2025-10-21T22:55:48.688Z

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. The zmmailboxdmgr binary, a component of ZCS, is intended to be executed by the zimbra user with root privileges for specific mailbox operations. However, an attacker can escalate privileges from the zimbra user to root, because of improper handling of input arguments. An attacker can execute arbitrary commands with elevated privileges, leading to local privilege escalation.

Published: 2024-08-12T00:00:00.000Z
Updated: 2024-08-13T14:44:13.521Z

Zimbra Collaboration before Kepler 9.0.0 Patch 38 GA allows DOM-based JavaScript injection in the Modern UI.

Published: 2024-02-13T00:00:00.000Z
Updated: 2024-08-19T14:45:34.594Z

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15, 9.0, and 10.0. XSS, with resultant session stealing, can occur via JavaScript code in a link (for a webmail redirection endpoint) within en email message, e.g., if a victim clicks on that link within Zimbra webmail.

Published: 2024-02-13T00:00:00.000Z
Updated: 2025-03-25T16:01:09.054Z

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15, 9.0, and 10.0. An attacker can send a PDF document through mail that contains malicious JavaScript. While previewing this file in webmail in the Chrome browser, the stored XSS payload is executed. (This has been mitigated by sanitising the JavaScript code present in a PDF document.)

Published: 2024-02-13T00:00:00.000Z
Updated: 2025-03-27T19:21:44.415Z

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15, 9.0, and 10.0. Through the help document endpoint in webmail, an attacker can inject JavaScript or HTML code that leads to cross-site scripting (XSS). (Adding an adequate message to avoid malicious code will mitigate this issue.)

Published: 2024-02-13T00:00:00.000Z
Updated: 2025-05-07T21:12:51.053Z

An XSS issue was discovered in a web endpoint in Zimbra Collaboration (ZCS) before 10.0.4 via an unsanitized parameter. This is also fixed in 8.8.15 Patch 43 and 9.0.0 Patch 36.

Published: 2023-12-07T00:00:00.000Z
Updated: 2024-08-02T19:37:22.951Z

An issue was discovered in Zimbra Collaboration (ZCS) before 10.0.4. An XSS issue can be exploited to access the mailbox of an authenticated user. This is also fixed in 8.8.15 Patch 43 and 9.0.0 Patch 36.

Published: 2023-12-07T00:00:00.000Z
Updated: 2024-08-02T19:37:23.342Z

An issue was discovered in Zimbra Collaboration (ZCS) before 10.0.3. An attacker can gain access to a Zimbra account. This is also fixed in 9.0.0 Patch 35 and 8.8.15 Patch 42.

Published: 2023-12-07T00:00:00.000Z
Updated: 2024-08-02T18:54:02.815Z

An issue in Zimbra Collaboration ZCS v.8.8.15 and v.9.0 allows an attacker to execute arbitrary code via the sfdc_preauth.jsp component.

Published: 2023-07-06T00:00:00.000Z
Updated: 2024-11-19T19:16:32.447Z

An issue in Zimbra Collaboration (ZCS) v.8.8.15 and v.9.0 allows a remote attacker to escalate privileges and obtain sensitive information via the password and 2FA parameters.

Published: 2023-07-06T00:00:00.000Z
Updated: 2024-11-19T17:26:11.033Z

In Zimbra Collaboration (ZCS) 8.8.15 and 9.0, a closed account (with 2FA and generated passwords) can send e-mail messages when configured for Imap/smtp.

Published: 2024-02-13T00:00:00.000Z
Updated: 2024-10-28T14:55:42.202Z

In Zimbra Collaboration Suite through 9.0 and 8.8.15, an attacker (who has initial user access to a Zimbra server instance) can execute commands as root by passing one of JVM arguments, leading to local privilege escalation (LPE).

Published: 2023-06-15T00:00:00.000Z
Updated: 2024-12-18T16:25:25.188Z

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 8.8.15. XSS can occur, via one of attributes of the webmail /h/ endpoint, to execute arbitrary JavaScript code, leading to information disclosure.

Published: 2023-06-15T00:00:00.000Z
Updated: 2024-12-18T16:26:53.151Z

An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0 and 8.8.15. To exploit the vulnerability, an attacker would need to have obtained a valid zimbra auth token or a valid preauth token. Once the token is obtained, an attacker could redirect a user to any URL if url sanitisation is bypassed in incoming requests. NOTE: this is similar, but not identical, to CVE-2021-34807.

Published: 2023-06-15T00:00:00.000Z
Updated: 2024-12-18T16:27:59.256Z

An issue was discovered in Zimbra Collaboration (ZCS) 9.0. XSS can occur via one of attributes in webmail URLs to execute arbitrary JavaScript code, leading to information disclosure.

Published: 2023-01-06T00:00:00.000Z
Updated: 2025-04-09T20:33:00.389Z

An issue was discovered in Zimbra Collaboration (ZCS) 9.0. XSS can occur on the Classic UI login page by injecting arbitrary JavaScript code in the username field. This occurs before the user logs into the system, which means that even if the attacker executes arbitrary JavaScript, they will not get any sensitive information.

Published: 2023-01-06T00:00:00.000Z
Updated: 2025-04-09T20:31:37.345Z

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload arbitrary files through amavis via a cpio loophole (extraction to /opt/zimbra/jetty/webapps/zimbra/public) that can lead to incorrect access to any other user accounts. Zimbra recommends pax over cpio. Also, pax is in the prerequisites of Zimbra on Ubuntu; however, pax is no longer part of a default Red Hat installation after RHEL 6 (or CentOS 6). Once pax is installed, amavis automatically prefers it over cpio.

Published: 2022-09-26T00:00:00.000Z
Updated: 2025-10-21T23:15:34.543Z

An issue was discovered in Zimbra Collaboration (ZCS) 9.0. XSS can occur via the onerror attribute of an IMG element, leading to information disclosure.

Published: 2022-10-12T00:00:00.000Z
Updated: 2025-05-15T14:57:23.535Z

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.x and 9.x (e.g., 8.8.15). The Sudo configuration permits the zimbra user to execute the NGINX binary as root with arbitrary parameters. As part of its intended functionality, NGINX can load a user-defined configuration file, which includes plugins in the form of .so files, which also execute as root.

Published: 2022-09-26T01:29:48.000Z
Updated: 2025-05-21T18:49:00.723Z

An issue was discovered in the webmail component in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. When using preauth, CSRF tokens are not checked on some POST endpoints. Thus, when an authenticated user views an attacker-controlled page, a request will be sent to the application that appears to be intended. The CSRF token is omitted from the request, but the request still succeeds.

Published: 2022-08-11T19:40:25.000Z
Updated: 2024-08-03T10:21:32.610Z

Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. By bypassing authentication (i.e., not having an authtoken), an attacker can upload arbitrary files to the system, leading to directory traversal and remote code execution. NOTE: this issue exists because of an incomplete fix for CVE-2022-27925.

Published: 2022-08-11T19:37:27.000Z
Updated: 2025-10-21T23:15:36.754Z

An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. The value of the X-Forwarded-Host header overwrites the value of the Host header in proxied requests. The value of X-Forwarded-Host header is not checked against the whitelist of hosts that ZCS is allowed to proxy to (the zimbraProxyAllowedDomains setting).

Published: 2022-08-11T19:06:49.000Z
Updated: 2024-08-03T10:21:32.678Z

A reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 allows unauthenticated attackers to execute arbitrary web script or HTML via request parameters.

Published: 2022-04-20T23:23:40.000Z
Updated: 2025-10-21T23:15:40.915Z

Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. An authenticated user with administrator rights has the ability to upload arbitrary files to the system, leading to directory traversal.

Published: 2022-04-20T23:23:25.000Z
Updated: 2025-10-21T23:15:41.071Z

Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to inject arbitrary memcache commands into a targeted instance. These memcache commands becomes unescaped, causing an overwrite of arbitrary cached entries.

Published: 2022-04-20T23:23:17.000Z
Updated: 2025-10-21T23:15:41.226Z

An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16. The value of the X-Host header overwrites the value of the Host header in proxied requests. The value of X-Host header is not checked against the whitelist of hosts Zimbra is allowed to proxy to (the zimbraProxyAllowedDomains setting).

Published: 2021-07-02T18:54:43.000Z
Updated: 2024-08-04T00:33:51.186Z

An issue was discovered in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.0 before 9.0.0 Patch 16. An XSS vulnerability exists in the login component of Zimbra Web Client, in which an attacker can execute arbitrary JavaScript by adding executable JavaScript to the loginErrorCode parameter of the login url.

Published: 2021-07-02T18:55:00.000Z
Updated: 2024-08-04T00:33:51.243Z

An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0. To exploit the vulnerability, an attacker would need to have obtained a valid zimbra auth token or a valid preauth token. Once the token is obtained, an attacker could redirect a user to any URL via isredirect=1&redirectURL= in conjunction with the token data (e.g., a valid authtoken= value).

Published: 2021-07-02T18:54:37.000Z
Updated: 2024-08-04T00:26:53.989Z

In Zimbra Collaboration Suite Network Edition versions < 9.0.0 P10 and 8.8.15 P17, there exists an XXE vulnerability in the saml consumer store extension, which is vulnerable to XXE attacks. This has been fixed in Zimbra Collaboration Suite Network edition 9.0.0 Patch 10 and 8.8.15 Patch 17.

Published: 2020-12-17T03:52:42.000Z
Updated: 2024-08-04T16:55:10.981Z