Description
A flaw was found in Moodle. A remote attacker could exploit a lack of proper rate limiting in the confirmation email service. This vulnerability allows attackers to more easily enumerate or guess user credentials, facilitating brute-force attacks against user accounts.
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-5cx4-w4fh-fr57 |
| Packagist | moodle/moodle | >= 4.4.0-beta, < 4.4.12 | 4.4.12 | GHSA-5cx4-w4fh-fr57 |
| Packagist | moodle/moodle | >= 4.5.0-beta, < 4.5.8 | 4.5.8 | GHSA-5cx4-w4fh-fr57 |
| Packagist | moodle/moodle | >= 5.0.0-beta, < 5.0.4 | 5.0.4 | GHSA-5cx4-w4fh-fr57 |
| Packagist | moodle/moodle | >= 5.1.0-beta, < 5.1.1 | 5.1.1 | GHSA-5cx4-w4fh-fr57 |
Advisories 1
- WID-SEC-2025-2851 Moodle: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 3, 2026
References
- https://access.redhat.com/security/cve/CVE-2025-67853 vdb-entry
- RHBZ#2423847 issue-tracking