CVE-2025-67856: Moodle: moodle: privilege escalation via incomplete role checks in badge awarding

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-03 · updated 2026-06-17
Weakness: CWE-863

Description

A flaw was found in Moodle. An authorization logic flaw, specifically due to incomplete role checks during the badge awarding process, allowed badges to be granted without proper verification. This could enable unauthorized users to obtain badges they are not entitled to, potentially leading to privilege escalation or unauthorized access to certain features.

Affected products

Moodle: before 4.1.22; from 4.4.0 before 4.4.12; from 4.5.0 before 4.5.8; from 5.0.0 before 5.0.4; 5.1.0 — fixed in 4.1.22, 4.4.12, 4.5.8, 5.0.4

How to fix

Upgrade to a fixed version: Moodle 4.1.22, 4.4.12, 4.5.8, 5.0.4. Check the vendor advisory for mitigations.

References

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