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    CVE-2026-34247

    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.

    Published:Mar 27, 2026
    Last Modified:Mar 31, 2026
    EPS:Mar 27, 2026
    EPSS Score:0.00009
    CVSS Score:5.4

    Affected Products

    Vendor
    Wwbn
    Product
    Avideo

    Exploits

    https://github.com/WWBN/AVideo/security/advisories/GHSA-g3hj-mf85-679g

    Common Weakness Enumeration

    CWE-862 Missing Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Related CVEs

    CVE-2026-89257 (CVSS 5.3) — AVideo through 29.0 contains an insecure direct object reference (IDOR) vulnerability in objects/categoryDelet…
    CVE-2026-89256 (CVSS 9.3) — AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerab…
    CVE-2026-89255 (CVSS 9.3) — AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerab…
    CVE-2026-89254 (CVSS 9.3) — AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerab…
    CVE-2026-89253 (CVSS 9.3) — WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vul…
    CVE-2026-89252 (CVSS 7.1) — AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 fails to verify ownership in addLiveLink.php wh…
    CVE-2026-89251 (CVSS 7.1) — AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 fails to validate ad impressions in plugin/AD_S…
    CVE-2026-89250 (CVSS 8.7) — WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains an unauthenticated file read vuln…
    CVE-2026-89249 (CVSS 9.3) — AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerab…
    CVE-2026-89248 (CVSS 6.9) — AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 is missing an authentication/authorization chec…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High