A vulnerability, which was classified as problematic, has been found in Moodle up to 3.7.2 (Learning Management Software). Affected by this issue is an unknown part of the file /course/modedit.php. The manipulation of the argument introeditor[text] as part of a Parameter leads to a cross site scripting vulnerability (Persistent). 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. CVE summarizes:

** DISPUTED ** Persistent XSS in /course/modedit.php of Moodle through 3.7.2 allows authenticated users (Teacher and above) to inject JavaScript into the session of another user (e.g., enrolled student or site administrator) via the introeditor[text] parameter. NOTE: the discoverer and vendor disagree on whether Moodle customers have a reasonable expectation that anyone authenticated as a Teacher can be trusted with the ability to add arbitrary JavaScript (this ability is not documented on Moodle's Teacher_role page). Because the vendor has this expectation, they have stated "this report has been closed as a false positive, and not a bug.�

The weakness was presented 02/11/2020. This vulnerability is handled as CVE-2019-18210 since 10/19/2019. The attack may be launched remotely. A simple authentication is necessary for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

The real existence of this vulnerability is still doubted at the moment. By approaching the search of inurl:course/modedit.php it is possible to find vulnerable targets with Google Hacking.

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

Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 3.7.0
• 3.7.1
• 3.7.2

License

• open-source

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