Moodle
CVE-2025-67849
HIGH
GHSA-mhf6-pp52-8wqj
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS 7.3 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: Required. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to inject malicious HTML or script into web pages. |
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Alert meAnalysisAIv1 – Mar 12, 2026
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. [CVSS 7.3 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in composer
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Moodle. 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.
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Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
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.
Executive ViewAI
CVE-2025-67849 is a cross-site scripting (XSS) vulnerability in Moodle's AI prompt response handling that could allow attackers to inject malicious code affecting students, instructors, and staff. Since no patch is currently available, immediate mitigation measures are required to protect user accounts and sensitive educational data from compromise.
Implement Web Application Firewall (WAF) rules to detect and block XSS patterns in AI responses; disable or restrict access to AI-assisted features until patch is available; enforce Content Security Policy (CSP) headers to limit script execution; implement additional output encoding on AI prompt responses; segment Moodle infrastructure from critical systems; monitor and log all AI feature usage; consider disabling the specific vulnerable AI functionality entirely until patched.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)CVE.org
Moodle through 2.5.2 allows remote authenticated administrators to execute arbitrary programs by configuring the aspell
A command execution vulnerability exists in the default legacy spellchecker plugin in Moodle 3.10. Rated critical severi
A flaw was found in Moodle. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authenticatio
In Moodle 2.x and 3.x, SQL injection can occur via user preferences. Rated critical severity (CVSS 9.8), this vulnerabil
The Moodle LMS Jmol plugin version 6.1 and earlier contains a path traversal vulnerability in jsmol.php. The query param
Multiple cross-site scripting (XSS) vulnerabilities in Moodle through 2.2.11, 2.3.x before 2.3.9, 2.4.x before 2.4.6, an
Unrestricted file upload vulnerability in the double extension support in the "image" module in Moodle 3.1.2 allows remo
Unrestricted file upload vulnerability in the "legacy course files" and "file manager" modules in Moodle 3.1.2 allows re
moodle before versions 3.5.2, 3.4.5, 3.3.8, 3.1.14 is vulnerable to an XML import of ddwtos could lead to intentional re
An issue was discovered in Moodle 3.x. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low a
Moodle 3.1.2 allows remote attackers to obtain sensitive information via unspecified vectors, related to a "SQL Injectio
Moodle 3.10.3 contains a persistent cross-site scripting vulnerability in the calendar event subtitle field that allows
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