Vulnerability · Published Feb 3, 2026 · Assigned by fedora
CVE-2025-67853Moodle: moodle: brute-force facilitation due to missing rate limiting in confirmation email service
High 7.5
In plain English
A high-severity security flaw in moodle. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 59.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | moodle/moodle | 4.1.22 | GHSA-5cx4-w4fh-fr57 |
| Packagist | moodle/moodle | 4.4.12 | GHSA-5cx4-w4fh-fr57 |
| Packagist | moodle/moodle | 4.5.8 | GHSA-5cx4-w4fh-fr57 |
| Packagist | moodle/moodle | 5.0.4 | GHSA-5cx4-w4fh-fr57 |
| Packagist | moodle/moodle | 5.1.1 | GHSA-5cx4-w4fh-fr57 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| moodle | 4.1.0 – before 4.1.224.4.0 – before 4.4.124.5.0 – before 4.5.85.0.0 – before 5.0.45.1.0 – before 5.1.1 |
Weakness: CWE-307 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://access.redhat.com/security/cve/CVE-2025-67853 vdb-entry, x_refsource_REDHAT
- RHBZ#2423847 issue-tracking, x_refsource_REDHAT