Vulnerability · Published Feb 3, 2026 · Assigned by fedora
CVE-2025-67857Moodle: moodle: data exposure of user identifiers in urls
Medium 4.3
In plain English
A medium-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 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.4%top 70.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A flaw was found in moodle. During anonymous assignment submissions, user identifiers were inadvertently exposed in URLs. This data exposure allows unauthorized viewers to see internal user IDs, compromising the intended anonymity and potentially leading to information disclosure.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | moodle/moodle | 4.1.22 | GHSA-8jrv-wx83-w3xj |
| Packagist | moodle/moodle | 4.4.12 | GHSA-8jrv-wx83-w3xj |
| Packagist | moodle/moodle | 4.5.8 | GHSA-8jrv-wx83-w3xj |
| Packagist | moodle/moodle | 5.0.4 | GHSA-8jrv-wx83-w3xj |
| Packagist | moodle/moodle | 5.1.1 | GHSA-8jrv-wx83-w3xj |
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-201 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
References
- https://access.redhat.com/security/cve/CVE-2025-67857 vdb-entry, x_refsource_REDHAT
- RHBZ#2423868 issue-tracking, x_refsource_REDHAT
- https://moodle.org/mod/forum/discuss.php?d=471307