Description
A flaw was found in Moodle. This cross-site scripting (XSS) vulnerability, caused by improper sanitization of AI prompt responses, allows attackers to inject malicious HTML or script into web pages. When other users view these compromised pages, their sessions could be stolen, or the user interface could be manipulated.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | moodle | 4.5.0 – < 4.5.8, 5.0.0 – < 5.0.4, 5.1.0 – < 5.1.1 | 4.5.8 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | moodle | No fix yet | — |
| Ubuntu Pro 16.04 LTS | moodle | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | moodle/moodle | < 4.1.22 | 4.1.22 | GHSA-mhf6-pp52-8wqj |
| Packagist | moodle/moodle | >= 4.4.0-beta, < 4.4.12 | 4.4.12 | GHSA-mhf6-pp52-8wqj |
| Packagist | moodle/moodle | >= 4.5.0-beta, < 4.5.8 | 4.5.8 | GHSA-mhf6-pp52-8wqj |
| Packagist | moodle/moodle | >= 5.0.0-beta, < 5.0.4 | 5.0.4 | GHSA-mhf6-pp52-8wqj |
| Packagist | moodle/moodle | >= 5.1.0-beta, < 5.1.1 | 5.1.1 | GHSA-mhf6-pp52-8wqj |
Advisories 1
- WID-SEC-2025-2851 Moodle: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 3, 2026
References
- https://access.redhat.com/security/cve/CVE-2025-67849 vdb-entry
- RHBZ#2423835 issue-tracking