CVE-2025-67857

Moodle: moodle: data exposure of user identifiers in urls

State: Published
Severity: 4.3 Medium
Published: Feb 3, 2026
Updated: Feb 3, 2026
Reserved: Dec 12, 2025

Description

A flaw was found in moodle. During anonymous assignment submissions, user identifiers were inadvertently exposed in URLs. This data exposure allows unauthorized viewers to see internal user IDs, compromising the intended anonymity and potentially leading to information disclosure.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N	fedora

Weaknesses

CWE-201 Insertion of Sensitive Information Into Sent Data

Affected Products

Product	Versions
moodle	4.1.0 to before 4.1.22Affected 4.4.0 to before 4.4.12Affected 4.5.0 to before 4.5.8Affected 5.0.0 to before 5.0.4Affected 5.1.0 to before 5.1.1Affected

References

https://access.redhat.com/security/cve/CVE-2025-67857vdb-entry
RHBZ#2423868issue-tracking
https://moodle.org/mod/forum/discuss.php?d=471307

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