Moodle up to 4.1.15/4.3.9/4.4.5/4.5.1 Site Administration Live Log cross site scripting

Summaryinfo

A vulnerability was found in Moodle up to 4.1.15/4.3.9/4.4.5/4.5.1. It has been classified as problematic. This issue affects some unknown processing of the component Site Administration Live Log. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2025-26529. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Moodle up to 4.1.15/4.3.9/4.4.5/4.5.1 and classified as problematic. Affected by this vulnerability is an unknown code block of the component Site Administration Live Log. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

It is possible to read the advisory at moodle.org. This vulnerability is known as CVE-2025-26529 since 02/12/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 253553 (Linux Distros Unpatched Vulnerability : CVE-2025-26529), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.1.16, 4.3.10, 4.4.6 or 4.5.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (253553). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.1.8
• 4.1.9
• 4.1.10
• 4.1.11
• 4.1.12
• 4.1.13
• 4.1.14
• 4.1.15
• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.3.5
• 4.3.6
• 4.3.7
• 4.3.8
• 4.3.9
• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5
• 4.5.0
• 4.5.1

License

• open-source

Website

• Product: https://moodle.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion