CVE-2026-33483 Details
Description
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.
A denial-of-service vulnerability has been identified in WWBN AVideo versions through 26.0. The issue arises from the aVideoEncoderChunk.json.php endpoint, which is a standalone PHP script lacking authentication, framework integration, and resource limits. This allows unauthenticated remote attackers to send arbitrary POST data that is written to temporary files in the /tmp/ directory without any size restrictions, rate limiting, or cleanup mechanism. As a result, the vulnerability can be easily exploited to exhaust disk space, causing a denial-of-service condition on the server.
Users are advised to update to the patched version of AVideo, which includes authentication, size limits, and a cleanup mechanism for temporary files. The latest version can be obtained from the official AVideo GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/WWBN/AVideo/commit/33d1bae6c731ef1682fcdc47b428313be073a5d1 | [email protected] | Patch |
| https://github.com/WWBN/AVideo/security/advisories/GHSA-vv7w-qf5c-734w | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wwbn avideo | <= 26.0 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 24, 2026 | Initial Analysis | [email protected] |
| Mar 23, 2026 | New CVE Received | [email protected] |