{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-56345: AVideo - Arbitrary User Session Hijacking via Meet Plugin uploadRecordedVideo Endpoint","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-56345","status":"final","version":"1","initial_release_date":"2026-06-20T18:27:12.134Z","current_release_date":"2026-06-20T18:27:12.134Z","revision_history":[{"date":"2026-06-20T18:27:12.134Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"AVideo through 29.0 contains an authorization bypass vulnerability in the Meet plugin's uploadRecordedVideo.json.php endpoint that derives the target users_id from the uploaded filename without verification. An attacker with knowledge of the Meet shared secret can craft a malicious file upload with a filename containing an arbitrary users_id to invoke passwordless User->login() and establish an authenticated session as any user including admin. Attackers can obtain the Meet shared secret through path-traversal vulnerabilities or timing attacks against checkToken.json.php, then POST a crafted file to uploadRecordedVideo.json.php with a filename like '1-anything.mp4' to hijack admin sessions and gain full account takeover.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-56345 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-56345"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-56345"},{"category":"external","summary":"GHSA Advisory GHSA-qxvm-r42f-5p8j","url":"https://github.com/WWBN/AVideo/security/advisories/GHSA-qxvm-r42f-5p8j"},{"category":"external","summary":"VulnCheck Advisory: AVideo - Arbitrary User Session Hijacking via Meet Plugin uploadRecordedVideo Endpoint","url":"https://www.vulncheck.com/advisories/avideo-arbitrary-user-session-hijacking-via-meet-plugin-uploadrecordedvideo-endpoint"}]},"product_tree":{"branches":[{"category":"vendor","name":"AVideo","branches":[{"category":"product_name","name":"AVideo","branches":[{"category":"product_version_range","name":"<=29.0","product":{"name":"AVideo AVideo <=29.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:avideo:avideo:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-56345","title":"AVideo - Arbitrary User Session Hijacking via Meet Plugin uploadRecordedVideo Endpoint","notes":[{"category":"description","text":"AVideo through 29.0 contains an authorization bypass vulnerability in the Meet plugin's uploadRecordedVideo.json.php endpoint that derives the target users_id from the uploaded filename without verification. An attacker with knowledge of the Meet shared secret can craft a malicious file upload with a filename containing an arbitrary users_id to invoke passwordless User->login() and establish an authenticated session as any user including admin. Attackers can obtain the Meet shared secret through path-traversal vulnerabilities or timing attacks against checkToken.json.php, then POST a crafted file to uploadRecordedVideo.json.php with a filename like '1-anything.mp4' to hijack admin sessions and gain full account takeover.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","baseScore":9.2,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}