ANSSI Warns of Multiple Moodle Vulnerabilities
Moodle versions before 4.5.13, 5.0.9, 5.1.6 and 5.2.2 contain multiple flaws enabling data exposure, XSS, and CSRF attacks.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- Whether this concerns you is not assessed; the names the report mentions are listed below.
ANSSI (France's national CERT) published an advisory detailing multiple vulnerabilities in Moodle, a widely used open-source learning management system (LMS), affecting versions 4.5.x prior to 4.5.13, 5.0.x prior to 5.0.9, 5.1.x prior to 5.1.6, and 5.2.x prior to 5.2.2. The vulnerabilities span several categories: unauthorized access to confidential data, security policy bypass, reflected/indirect cross-site scripting (XSS), and cross-site request forgery (CSRF) allowing illegitimate request injection. The specific technical mechanisms have not been detailed by the vendor.
No evidence of active exploitation in the wild is mentioned in this advisory. The bulletin references ten separate Moodle security forum disclosures (dated 9 September 2026) without providing individual CVE identifiers, indicating a batch of distinct issues patched simultaneously by the Moodle project.
Defenders operating Moodle instances — commonly deployed across educational institutions, universities, and corporate training platforms — should prioritize upgrading to the fixed versions (4.5.13, 5.0.9, 5.1.6, or 5.2.2 or later) referenced in the vendor's official bulletins. Given the mix of data confidentiality, XSS, and CSRF issues, organizations should also review session handling, input sanitization on user-facing forms, and access controls for sensitive data endpoints as part of remediation validation.
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1155
Free public brief. Slack alerts on the vendors you run come with the paid plans, and a new account gets three days of them, no card.
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. The paid plans add the security research and news reporting the free tier leaves out.
It sits in a corpus of 16,436 reports from 149 sources, 661 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Slack alerts are a paid-plan feature: name the vendors you run and Slack hears about the reports that touch them, not the rest of the week's. Nothing is charged unless you subscribe.
Create a free account What it costs