Moodle Groups Page cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Moodle. The affected element is an unknown function of the component Groups Page. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2023-35131. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Moodle (Learning Management Software) (affected version unknown) and classified as problematic. This issue affects an unknown functionality of the component Groups Page. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is:

Content on the groups page required additional sanitizing to prevent an XSS risk. This flaw affects Moodle versions 4.2, 4.1 to 4.1.3, 4.0 to 4.0.8 and 3.11 to 3.11.14.

The weakness was published 06/23/2023. The advisory is shared at moodle.org. The identification of this vulnerability is CVE-2023-35131 since 06/13/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/06/2025). MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 261518 (Linux Distros Unpatched Vulnerability : CVE-2023-35131), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (261518) and EUVD (EUVD-2023-1791). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Learning Management Software

Name

• Moodle

License

• open-source

Website

• Product: https://moodle.org/

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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