{"id":"CVE-2026-108164","title":"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","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…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-639"],"published":"2026-10-10","updated":"2026-10-10","sourceUpdated":"2026-10-10T14:16:37.663","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-108164","references":[{"url":"https://github.com/opensource-socialnetwork/opensource-socialnetwork","label":"disclosure@vulncheck.com"},{"url":"https://github.com/opensource-socialnetwork/opensource-socialnetwork/blob/48b53f5b95488187715b2d5b5ae46a993267f83d/components/OssnMessages/ossn_com.php#L149-L156","label":"disclosure@vulncheck.com"},{"url":"https://github.com/opensource-socialnetwork/opensource-socialnetwork/commit/2e9733d8eaafccdaef3d9b498348c8332e51f48b","label":"disclosure@vulncheck.com"},{"url":"https://github.com/opensource-socialnetwork/opensource-socialnetwork/issues/2641","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@leediay/ossn-idor-message-attachment","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/open-source-social-network-ossn-through-10.1-idor-via-message-attachment-route","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-10T15:25:58.082Z","slug":"CVE-2026-108164","body":"## Overview\n\nOpen 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}