Moodle
CVE-2019-3850
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V3 - Web Frontend Security Redirect URL validation
MITRE ATT&CK
1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. |
| Exploit ScenarioDerived | A remote attacker could redirect users to malicious websites via URL manipulation by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
A vulnerability was found in moodle before versions 3.6.3, 3.5.5, 3.4.8 and 3.1.17. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Open Redirect vulnerability could allow attackers to redirect users to malicious websites via URL manipulation.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Validate redirect destinations against an allowlist, avoid using user input in redirect URLs.
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
This vulnerability is classified as Open Redirect (CWE-601), which allows attackers to redirect users to malicious websites via URL manipulation. A vulnerability was found in moodle before versions 3.6.3, 3.5.5, 3.4.8 and 3.1.17. Links within assignment submission comments would open directly (in the same window). Although links themselves may be valid, opening within the same window and without the no-referrer header policy made them more susceptible to exploits. Affected products include: Moodle.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
A vulnerability was found in moodle before versions 3.6.3, 3.5.5, 3.4.8 and 3.1.17. Links within assignment submission comments would open directly (in the same window). Although links themselves may be valid, opening within the same window and without the no-referrer header policy made them more susceptible to exploits.
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
Affected Products (CPE)NVD
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
GitHub PoC
Exploit-DB