{"schema":"threatline.record/2","record":{"id":"CVE-2026-108164","aliases":[],"summary":"Open Source Social Network (OSSN) through 10.1 IDOR via Message Attachment Route","details":"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.","categories":["Unclassified"],"product":"opensource-socialnetwork","vendor":"opensource-socialnetwork","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-108164","source_modified_at":"2026-10-13T18:29:24.342Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"opensource-socialnetwork","vendor":"opensource-socialnetwork","versions":[{"version":"0","status":"affected","versionType":"custom","lessThanOrEqual":"10.1"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":7.1,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00257,"percentile":0.16469,"score_date":"2026-10-23"},"published_at":"2026-10-10T13:55:14.834Z","modified_at":"2026-10-13T18:29:24.342Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-108164","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T18:29:24.342Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-108164","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/opensource-socialnetwork/opensource-socialnetwork/issues/2641","tags":["issue-tracking"]},{"source":"CVE List","url":"https://github.com/opensource-socialnetwork/opensource-socialnetwork/commit/2e9733d8eaafccdaef3d9b498348c8332e51f48b","tags":["patch"]},{"source":"CVE List","url":"https://hackmd.io/@leediay/ossn-idor-message-attachment","tags":["exploit","technical-description"]},{"source":"CVE List","url":"https://github.com/opensource-socialnetwork/opensource-socialnetwork/blob/48b53f5b95488187715b2d5b5ae46a993267f83d/components/OssnMessages/ossn_com.php#L149-L156","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/opensource-socialnetwork/opensource-socialnetwork","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/open-source-social-network-ossn-through-10.1-idor-via-message-attachment-route","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-13T18:29:08.792260Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-13T18:29:24.342Z","content_hash":"c6c7714494cf32e42328e20b661d95da40a00c766174c9fdda235ec695ef03bc"}}