Description
A flaw was found in Moodle. This authentication bypass vulnerability allows suspended users to authenticate through the Learning Tools Interoperability (LTI) Provider. The issue arises from the LTI authentication handlers failing to enforce the user's suspension status, enabling unauthorized access to the system. This can lead to information disclosure or other unauthorized actions by users who should be restricted.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | moodle | 4.1.0 – < 4.1.22, 4.4.0 – < 4.4.12, 4.5.0 – < 4.5.8, 5.0.0 – < 5.0.4, 5.1.0 – < 5.1.1 | 4.1.22 |
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-j5jv-w5cw-j9ff |
| Packagist | moodle/moodle | >= 4.4.0-beta, < 4.4.12 | 4.4.12 | GHSA-j5jv-w5cw-j9ff |
| Packagist | moodle/moodle | >= 4.5.0-beta, < 4.5.8 | 4.5.8 | GHSA-j5jv-w5cw-j9ff |
| Packagist | moodle/moodle | >= 5.0.0-beta, < 5.0.4 | 5.0.4 | GHSA-j5jv-w5cw-j9ff |
| Packagist | moodle/moodle | >= 5.1.0-beta, < 5.1.1 | 5.1.1 | GHSA-j5jv-w5cw-j9ff |
Advisories 1
- WID-SEC-2025-2851 Moodle: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 3, 2026