Vulnerability · Published Sep 30, 2026 · Assigned by fedora
CVE-2026-102585Moodle: group validation missing when enrolling user to course
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 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 90.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A flaw was found in Moodle. When enrolling a user into a course while assigning them to a group, the application does not verify whether the selected group actually belongs to that course. An authenticated user with teacher privileges could exploit this flaw to add users to groups within courses they do not have authorization to access.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| moodle | 5.2.0 – before 5.2.25.1.0 – before 5.1.6 |
Weakness: CWE-842 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88538
- https://access.redhat.com/security/cve/CVE-2026-102585 vdb-entry, x_refsource_REDHAT
- RHBZ#2543639 issue-tracking, x_refsource_REDHAT
- https://moodle.org/mod/forum/discuss.php?d=482503