Medium severity · published Feb 3, 2026
CVE-2025-67849
Moodle: moodle: cross-site scripting (xss) via improper sanitization of ai prompt responses
6.1
CVSS
0.3%
EPSS
No
On KEV
Description
A flaw was found in Moodle. This cross-site scripting (XSS) vulnerability, caused by improper sanitization of AI prompt responses, allows attackers to inject malicious HTML or script into web pages. When other users view these compromised pages, their sessions could be stolen, or the user interface could be manipulated.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Moodle · Moodle
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-2025-67849
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-67849
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2025-67849
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2423835
More from Moodle
10.0
CVE-2019-3809
A flaw was found in Moodle versions 3.1 to 3.1.15 and earlier unsupported versions
9.8
CVE-2025-67856
Moodle: moodle: privilege escalation via incomplete role checks in badge awarding
9.8
CVE-2025-26533
SQL injection risk in course search module list filter
9.8
CVE-2024-33999
moodle: unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php
9.8
CVE-2023-5550
Moodle: rce due to lfi risk in some misconfigured shared hosting environments