Medium severity · published Feb 3, 2026
CVE-2025-67857
Moodle: moodle: data exposure of user identifiers in urls
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Moodle · Moodle
before 4.1.21; 4.4.0 before 4.4.11; 4.5.0 before 4.5.8; 5.0.0 before 5.0.4; 5.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-67857
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-67857
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2025-67857
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2423868
Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=471307
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