3.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2025-3635

CVE-2025-3635: Moodle has a CSRF risk in user tours manager that allows tour duplication

A security vulnerability was discovered in Moodle that allows anyone to duplicate existing tours without needing to log in due to a lack of protection against cross-site request forgery (CSRF) attacks.

(GitHub Advisory)

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CVE-2025-3635

CVE-2025-3635:

3.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
moodle/moodle	composer	< 4.1.18	4.1.18
moodle/moodle	composer	>= 4.3.0-beta, < 4.3.12	4.3.12
moodle/moodle	composer	>= 4.4.0-beta, < 4.4.8	4.4.8
moodle/moodle	composer	>= 4.5.0-beta, < 4.5.4	4.5.4

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability is a CSRF risk in the user tours manager allowing tour duplication. The provided commit dbd723f81c07423d4082d54cd1d90b1b68c44379 shows changes in two files. The critical change is in admin/tool/usertours/classes/manager.php, where the duplicate_tour method has require_sesskey(); added. This indicates that previously, this method, which performs the state-changing action of duplicating a tour, did not check for a session key (CSRF token), thus making it vulnerable. The function duplicate_tour is therefore identified as the vulnerable function because it's where the security check was missing. The other modified function, get_duplicate_tour_link in admin/tool/usertours/classes/helper.php, was updated to include the sesskey in the URL it generates; this is part of the fix to ensure legitimate requests pass the newly added check in duplicate_tour, rather than being the location of the vulnerability itself. The vulnerable function is \tool_usertours\manager::duplicate_tour because it lacked the CSRF token check before the patch was applied, directly leading to the vulnerability described.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

Vulnerability Intelligence
Miggo AI

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WAF Protection Rules

WAF Rule

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Reasoning

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