CVE-2025-62395: Moodle: external cohort search service leaks system cohort data

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-23 · updated 2026-06-17
Weakness: CWE-284

Description

A flaw in the cohort search web service allowed users with permissions in lower contexts to access cohort information from the system context, revealing restricted administrative data.

Affected products

Moodle: from 4.1.0 before 4.1.21; from 4.4.0 before 4.4.11; from 4.5.0 before 4.5.7; from 5.0.0 before 5.0.3 — fixed in 4.1.21, 4.4.11, 4.5.7, 5.0.3

How to fix

Upgrade to a fixed version: Moodle 4.1.21, 4.4.11, 4.5.7, 5.0.3. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/CVE-2025-62395
https://bugzilla.redhat.com/show_bug.cgi?id=2404428

Get alerted when CVE-2025-62395 or the next vulnerability affects your stack