Bug 2404430 (CVE-2025-62397)

Summary: CVE-2025-62397 moodle: Router produces JSON instead of 404 error for invalid course ID
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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The router’s inconsistent response to invalid course IDs allowed attackers to infer which course IDs exist, potentially aiding reconnaissance.
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Bug Depends On: 2404455, 2404456    
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Description OSIDB Bzimport 2025-10-16 14:32:31 UTC 
When supplied with non-existent course IDs, the router returned JSON data instead of a standard 404 response. This discrepancy enables attackers to distinguish between valid and invalid course identifiers, facilitating user enumeration or reconnaissance.

Versions affected: 5.0 to 5.0.2
Versions fixed: 5.0.3