What is the CVSS score of CVE-2025-26529?

CVE-2025-26529 has a CVSS 3.1 base score of 8.3 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Moodle are affected by CVE-2025-26529?

CVE-2025-26529 presents notable security risk, a cross-site scripting vulnerability rated CVSS 8.3.. A patch is available.

How to fix or mitigate CVE-2025-26529?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Verify anti-CSRF tokens and content security policies are enforced.

Moodle CVE-2025-26529

HIGH

Cross-site Scripting (XSS) (CWE-79)

2025-02-24 patrick@puiterwijk.org

XSS Moodle

8.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.3 HIGH

AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:28 vuln.today

Patch released

Mar 28, 2026 - 18:28 nvd

Patch available

CVE Published

Feb 24, 2025 - 20:15 nvd

HIGH 8.3

DescriptionCVE.org

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

AnalysisAI

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk. Rated high severity (CVSS 8.3), this vulnerability is remotely exploitable, no authentication required. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk. Affected products include: Moodle.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

CVE-2025-26529 vulnerability details – vuln.today

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Moodle CVE-2025-26529

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code