Medium severity · published Sep 30, 2026
CVE-2026-102585
Moodle: group validation missing when enrolling user to course
4.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Moodle · Moodle
5.1.0 before 5.1.6; 5.2.0 before 5.2.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102585
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102585
git.moodle.org
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88538
vdb-entry
https://access.redhat.com/security/cve/CVE-2026-102585
issue-tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2543639
moodle.org
https://moodle.org/mod/forum/discuss.php?d=482503
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