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    CVE-2026-33483

    WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `aVideoEncoderChunk.json.php` endpoint is a completely standalone PHP script with no authentication, no framework includes, and no resource limits. An unauthenticated remote attacker can send arbitrary POST data which is written to persistent temp files in `/tmp/` with no size cap, no rate limiting, and no cleanup mechanism. This allows trivial disk space exhaustion leading to denial of service of the entire server. Commit 33d1bae6c731ef1682fcdc47b428313be073a5d1 contains a patch.

    Published:Mar 23, 2026
    Last Modified:Mar 25, 2026
    EPS:Mar 23, 2026
    EPSS Score:0.00331
    CVSS Score:7.5

    Affected Products

    Vendor
    Wwbn
    Product
    Avideo

    Exploits

    https://github.com/WWBN/AVideo/security/advisories/GHSA-vv7w-qf5c-734w

    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