Moodle: Stored XSS risk in admin live log (CVE-2025-26529)
Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2025-26529 in Moodle involves insufficient sanitization of description information displayed in the site administration live log, leading to a stored XSS risk. This flaw allows malicious scripts to be stored and executed when administrators view the live log. The issue affects Moodle versions 4.1.0 through 4.1.15, 4.3.0 through 4.3.9, 4.4.0 through 4.4.5, and 4.5.0 through 4.5.1. A patch has been made available in the Moodle code repository to remediate this vulnerability.
Potential Impact
Successful exploitation of this stored XSS vulnerability could allow an attacker to execute arbitrary scripts in the context of the Moodle site administration interface, potentially leading to session hijacking or other administrative actions. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available and should be applied to affected Moodle versions to remediate the stored XSS vulnerability. Refer to the official Moodle repository commit MDL-84145 for the fix. No additional mitigation actions are indicated by the vendor advisory.
Moodle: Stored XSS risk in admin live log (CVE-2025-26529)
Description
Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.
Affected software
pkg:bitnami/moodleRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2025-26529 in Moodle involves insufficient sanitization of description information displayed in the site administration live log, leading to a stored XSS risk. This flaw allows malicious scripts to be stored and executed when administrators view the live log. The issue affects Moodle versions 4.1.0 through 4.1.15, 4.3.0 through 4.3.9, 4.4.0 through 4.4.5, and 4.5.0 through 4.5.1. A patch has been made available in the Moodle code repository to remediate this vulnerability.
Potential Impact
Successful exploitation of this stored XSS vulnerability could allow an attacker to execute arbitrary scripts in the context of the Moodle site administration interface, potentially leading to session hijacking or other administrative actions. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available and should be applied to affected Moodle versions to remediate the stored XSS vulnerability. Refer to the official Moodle repository commit MDL-84145 for the fix. No additional mitigation actions are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-moodle-2025-26529
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2025-26529"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Medium
Patch Information
Threat ID: 6aa00610acd9273b49ab738a
Added to database: 09/08/2026, 12:56:48 UTC
Last enriched: 09/08/2026, 13:41:39 UTC
Last updated: 09/10/2026, 22:04:13 UTC
Views: 10
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