CVE Catalog

CVE-2026-108164

MediumCVSS 6.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.26%

16th percentile - higher than 16% of all known CVEs

Summary

Open Source Social Network (OSSN) through 10.1 contains an insecure direct object reference vulnerability in components/OssnMessages/ossn_com.php that allows authenticated users to read other users' private message attachments. Attackers can request the /messages/attachment/{guid} route with sequential or guessed file GUIDs to retrieve attachments from private conversations without sender or recipient verification.

Risk Assessment

The risk is the potential unauthorized access to private attachments, which could lead to privacy violations and leakage of sensitive information.

Recommendation

It is recommended to update OSSN to a patched version and implement proper access controls for attachments.

Related vulnerabilities

Original NVD description (English source)

Open Source Social Network (OSSN) through 10.1 contains an insecure direct object reference vulnerability in components/OssnMessages/ossn_com.php that allows authenticated users to read other users' private message attachments. Attackers can request the /messages/attachment/{guid} route with sequential or guessed file GUIDs to retrieve attachments from private conversations without sender or recipient verification.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS