Moodle up to 4.1.10/4.2.7/4.3.4/4.4 Calendar Event cross site scripting

Summaryinfo

A vulnerability has been found in Moodle up to 4.1.10/4.2.7/4.3.4/4.4 and classified as problematic. Affected by this issue is some unknown functionality of the component Calendar Event Handler. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2024-38274. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in Moodle up to 4.1.10/4.2.7/4.3.4/4.4. This affects an unknown part of the component Calendar Event 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:

Insufficient escaping of calendar event titles resulted in a stored XSS risk in the event deletion prompt.

The advisory is shared at moodle.org. This vulnerability is uniquely identified as CVE-2024-38274 since 06/12/2024. The exploitability is told to be easy. It is possible to initiate the attack remotely. 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 261444 (Linux Distros Unpatched Vulnerability : CVE-2024-38274), 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 vulnerability database at Tenable (261444). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 4.0
• 4.1
• 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
• 4.2
• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3
• 4.2.4
• 4.2.5
• 4.2.6
• 4.2.7
• 4.3
• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.4

License

• open-source

Website

• Product: https://moodle.org/

CPE 2.3info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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