CVE-2026-102585: moodle — Fix

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.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0020

Probability of exploitation

0.09%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-842 CWE-842

Affected Products

Vendor	Product	Versions
moodle	moodle	5.1.0 — 5.1.6
moodle	moodle	5.2.0 — 5.2.2

References

Advisories & Patches

http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88538 https://moodle.org/mod/forum/discuss.php?d=482503

Other References

https://access.redhat.com/security/cve/CVE-2026-102585 https://bugzilla.redhat.com/show_bug.cgi?id=2543639

Frequently Asked Questions

What is CVE-2026-102585? +

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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-102585? +

CVE-2026-102585 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0020, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-102585? +

CVE-2026-102585 affects products from moodle, specifically: moodle. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-102585? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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