{"id":"CVE-2026-108164","revision":"3e42df2b174b4a9bbc31704faf427e9e","records":[{"revision":"3e42df2b174b4a9bbc31704faf427e9e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-108164","aliases":[],"title":"Open Source Social Network (OSSN) through 10.1 IDOR via Message Attachment Route","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.","state":0,"publishedAt":"2026-10-10T13:55:14.834+00:00","modifiedAt":"2026-10-13T18:29:24.342+00:00","affected":[{"ecosystem":"Vendor product","name":"opensource-socialnetwork","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"opensource-socialnetwork\",\n                    \"product\": \"opensource-socialnetwork\",\n                    \"packageURL\": \"pkg:github/opensource-socialnetwork/opensource-socialnetwork\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\",\n                            \"lessThanOrEqual\": \"10.1\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":7.1,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/opensource-socialnetwork/opensource-socialnetwork/issues/2641","https://github.com/opensource-socialnetwork/opensource-socialnetwork/commit/2e9733d8eaafccdaef3d9b498348c8332e51f48b","https://hackmd.io/@leediay/ossn-idor-message-attachment","https://github.com/opensource-socialnetwork/opensource-socialnetwork/blob/48b53f5b95488187715b2d5b5ae46a993267f83d/components/OssnMessages/ossn_com.php#L149-L156","https://github.com/opensource-socialnetwork/opensource-socialnetwork","https://www.vulncheck.com/advisories/open-source-social-network-ossn-through-10.1-idor-via-message-attachment-route"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-108164","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-108164","identifiers":["CVE-2026-108164"]},"retained":false,"historicalAffected":[]}],"coverage":[]}