Persistent XSS in /course/modedit.php of Moodle through 3.7.2 allows authenticated users…
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
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."
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | moodle/moodle (Packagist) | 3.7 – 3.7.2 | — | No fix listed | GHSA-q6vw-27c6-jv9c |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- moodle/moodle (Packagist) Vendor— Affected 3.7 – 3.7.2 Fixed in — No fix listed GHSA-q6vw-27c6-jv9c
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-18210
- 2026-10-03 Alias added: GHSA-q6vw-27c6-jv9c
References
More Moodle vulnerabilities
- TI-2024-22468 moodle: unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php CVSS 3.1CRITICAL 9.8
- TI-2021-14741 In Moodle, an SQL injection risk was identified in the library fetching a user's recent courses. CVSS 3.1CRITICAL 9.8
- TI-2024-29071 Moodle: remote code execution via calculated question types CVSS 3.1HIGH 8.1
- TI-2016-06653 Moodle 3.1.2 allows remote attackers to obtain sensitive information via unspecified… CVSS 3.1HIGH 7.5
- TI-2022-00259 SQL injection in moodle CVSS 3.1CRITICAL 9.8
- TI-2022-16116 Path traversal in Moodle CVSS 3.1HIGH 7.5
Sources
- CVE-2019-18210 · CVE Program
- CVE-2019-18210 · NVD
- FIRST EPSS
- GHSA-q6vw-27c6-jv9c · GitHub Advisory Database · CC BY 4.0
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