Resource exhaustion in Wwbn Avideo
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 · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001
Affected products
- Wwbn Avideo — versions <= 26.0
Weakness classification (CWE)
References
- github.com/WWBN/AVideo/security/advisories/GHSA-vv7w-qf5c-734w (Exploit, Mitigation, Vendor Advisory)
- github.com/WWBN/AVideo/commit/33d1bae6c731ef1682fcdc47b428313be073a5d1 (Patch)
Frequently asked questions
- What is CVE-2026-33483?
- CVE-2026-33483 is a high-severity vulnerability in Wwbn Avideo, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-03-23.
- How severe is CVE-2026-33483?
- High severity. CVSS v3 base score is 7.5 out of 10.