CVE WatchOct 16, 2026

CVE-2026-108164

Open Source Social Network (OSSN) through 10.1 contains an insecure direct object reference vulnerability in components/OssnMessages/ossn_co

CVSS

6.5

Medium

EPSS

0.3%

p16

KEV

—

Exploit Today

0-100

Published: Oct 10, 2026 · Last modified: Oct 16, 2026 · CWE-639

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-10-112026-10-23

Technical description

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.

Official references

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