HIGH 7.1 NVD
CVE-2026-108164
Open Source Social Network (OSSN) through 10.1 contains an insecure direct object reference vulnerability in components/OssnMessages/ossn_com.php that allows au
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.
References
- https://github.com/opensource-socialnetwork/opensource-socialnetwork
- https://github.com/opensource-socialnetwork/opensource-socialnetwork/blob/48b53f5b95488187
- https://github.com/opensource-socialnetwork/opensource-socialnetwork/commit/2e9733d8eaafcc
- https://github.com/opensource-socialnetwork/opensource-socialnetwork/issues/2641
- https://hackmd.io/@leediay/ossn-idor-message-attachment
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-10-10 via NVD.
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