Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-3111 is an Insecure Direct Object Reference (IDOR) vulnerability found in Campus Educativa, an e-learning software for companies.'}, {'type': 'paragraph', 'content': "The vulnerability specifically affects the endpoint '/archivos/usuarios/[ID]/[username]/thumb_AAxAA.jpg', which serves user profile photos in sizes 80x90 and 40x45 pixels."}, {'type': 'paragraph', 'content': 'An unauthenticated attacker can exploit this vulnerability by manipulating the URL to access profile photos of all users without authorization.'}, {'type': 'paragraph', 'content': 'This unauthorized access allows mass collection of user photos, which can be misused for identity impersonation, social engineering attacks, linking identities across platforms using facial recognition, or doxxing.'}] [1]

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Impact Analysis

The vulnerability allows an attacker to access and collect profile photos of all users without authentication.

• Identity impersonation using stolen photos.
• Social engineering attacks leveraging user images.
• Linking user identities across different platforms through facial recognition.
• Doxxing or exposing personal information by distributing collected photos.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': "This vulnerability can be detected by attempting to access the endpoint '/archivos/usuarios/[ID]/[username]/thumb_AAxAA.jpg' with manipulated user IDs and usernames in the URL to see if unauthorized profile photos are accessible."}, {'type': 'paragraph', 'content': 'A simple method to test this is to use command-line tools like curl or wget to request profile photo URLs with different user IDs and usernames and check if the server returns images without authentication.'}, {'type': 'list_item', 'content': 'curl -I https://[target-domain]/archivos/usuarios/1/username/thumb_AAxAA.jpg'}, {'type': 'list_item', 'content': 'curl -I https://[target-domain]/archivos/usuarios/2/otheruser/thumb_AAxAA.jpg'}, {'type': 'paragraph', 'content': 'If these requests return HTTP 200 responses with image content without requiring authentication, it indicates the presence of the vulnerability.'}] [1]

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Mitigation Strategies

[{'type': 'paragraph', 'content': 'The immediate step to mitigate this vulnerability is to upgrade Campus Educativa to version 14.05.00-159 or later, where the issue has been fixed.'}, {'type': 'paragraph', 'content': "Additionally, restrict access to the '/archivos/usuarios/' endpoint by implementing proper access controls to ensure that only authorized users can access profile photos."}, {'type': 'paragraph', 'content': 'Monitor access logs for unusual or unauthorized requests to user photo URLs and consider temporarily disabling public access to these resources until the patch is applied.'}] [1]

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