RabbitMQ Server up to 4.0.2 cross site scripting

Summaryinfo

A vulnerability was found in RabbitMQ Server up to 4.0.2. It has been declared as problematic. Affected by this vulnerability is an unknown functionality. The manipulation results in cross site scripting. This vulnerability is identified as CVE-2025-30219. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in RabbitMQ Server up to 4.0.2. Affected is some unknown processing. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

RabbitMQ is a messaging and streaming broker. Versions prior to 4.0.3 are vulnerable to a sophisticated attack that could modify virtual host name on disk and then make it unrecoverable (with other on disk file modifications) can lead to arbitrary JavaScript code execution in the browsers of management UI users. When a virtual host on a RabbitMQ node fails to start, recent versions will display an error message (a notification) in the management UI. The error message includes virtual host name, which was not escaped prior to open source RabbitMQ 4.0.3 and Tanzu RabbitMQ 4.0.3, 3.13.8. An attack that both makes a virtual host fail to start and creates a new virtual host name with an XSS code snippet or changes the name of an existing virtual host on disk could trigger arbitrary JavaScript code execution in the management UI (the user's browser). Open source RabbitMQ `4.0.3` and Tanzu RabbitMQ `4.0.3` and `3.13.8` patch the issue.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-30219 since 03/18/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability scanner Nessus provides a plugin with the ID 234064 (CBL Mariner 2.0 Security Update: rabbitmq-server (CVE-2025-30219)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.0.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (234064) and CERT Bund (WID-SEC-2026-1730). Once again VulDB remains the best source for vulnerability data.

Affected

• Xerox FreeFlow Print Server

Productinfo

Vendor

• RabbitMQ

Name

• Server

Version

• 4.0.0
• 4.0.1
• 4.0.2

CPE 2.3info

• 🔍
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CPE 2.2info

• 🔍
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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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