Moodle up to 4.1.15/4.3.9/4.4.5/4.5.1 Question Type 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 rated as problematic. The affected element is an unknown function of the component Question Type Handler. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2025-26528. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

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 affects an unknown function of the component Question Type Handler. 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. The summary by CVE is:

The drag-and-drop onto image (ddimageortext) question type required additional sanitizing to prevent a stored XSS risk.

The advisory is shared at moodle.org. This vulnerability is uniquely identified as CVE-2025-26528 since 02/12/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 253544 (Linux Distros Unpatched Vulnerability : CVE-2025-26528), 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 (253544). 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

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

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CPE 2.2info

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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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