CVE-2025-67856
Published: 03 February 2026
Summary
CVE-2025-67856 is a medium-severity Incorrect Authorization (CWE-863) vulnerability in Moodle Moodle. Its CVSS base score is 5.4 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 5.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Periodic review and update of procedures reduces incorrect authorization implementations over time.
Supervision identifies cases where authorization logic incorrectly permits unauthorized actions.
Defining permitted attribute values and auditing modifications reduces the chance of incorrect authorization outcomes due to tampered or missing labels.
The authorization process and usage restrictions help prevent incorrect authorization for remote access types.
Establishing configuration and connection requirements helps ensure correct rather than incorrect authorization for wireless access.
Establishing connection authorization processes for mobile devices helps ensure authorization decisions are correctly implemented rather than incorrect.
Monitoring account use, notifying on changes, and reviewing accounts for compliance corrects incorrect authorization assignments.
Ensures authorization decisions for external system use are correctly implemented and enforced.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Authorization bypass in badge awarding directly enables unauthorized privilege escalation to access gated features.
NVD 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…
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entitled to, potentially leading to privilege escalation or unauthorized access to certain features.
Deeper analysisAI
CVE-2025-67856 is an authorization logic flaw in Moodle, stemming from incomplete role checks during the badge awarding process. This vulnerability allows badges to be granted without proper verification, enabling unauthorized users to obtain badges they are not entitled to. Published on 2026-02-03, it is associated with CWE-863 (Incorrect Authorization) and carries a CVSS v3.1 base score of 5.4 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N), rated as Medium severity.
The vulnerability can be exploited by a low-privileged authenticated user over the network with low attack complexity and no user interaction required. Attackers can manipulate the badge awarding mechanism to self-award or award badges improperly, potentially resulting in privilege escalation or unauthorized access to Moodle features gated by those badges.
Red Hat has issued an advisory detailing the issue at https://access.redhat.com/security/cve/CVE-2025-67856, with additional tracking in Bugzilla at https://bugzilla.redhat.com/show_bug.cgi?id=2423864. Security practitioners should consult these resources for patch availability and mitigation guidance specific to affected Moodle deployments.
Details
- CWE(s)