What’s Vulnerable › Vulnerabilities

CVE-2019-18210

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-11 · updated 2026-06-17
• Weakness: CWE-79

Description

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."

Affected products

• Moodle: through 3.7.2

References

• https://docs.moodle.org/38/en/Teacher_role
• https://gist.github.com/Danbardo/4a6b0fe8cb21ec6d7c54e6ac951bdb0a
• https://docs.moodle.org/38/en/Teacher_role
• https://gist.github.com/Danbardo/4a6b0fe8cb21ec6d7c54e6ac951bdb0a

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