AVideo has an unauthenticated decrypt oracle leaking any ciphertext

published 2026-03-20 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-14479 , GHSA-mwjc-5j4x-r686

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits: 0; none known

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the API plugin exposes a `decryptString` action without any authentication. Anyone can submit ciphertext and receive plaintext. Ciphertext is issued publicly (e.g., `view/url2Embed.json.php`), so any user can recover protected tokens/metadata. Commit 3fdeecef37bb88967a02ccc9b9acc8da95de1c13 contains a patch.

Patch / fix

links 1

github.com/WWBN/AVideo@3fdeece commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: partial
Assessed: 7 mo ago (2026-03-24)

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/WWBN/AVideo/security/advisories/GHSA-mwjc-5j4x-r686 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	wwbn/avideo	<=26.0	no fix listed

Affected products

WWBN AVideo

Classification

Weakness

CWE-287 Improper Authentication
CWE-312 Cleartext Storage of Sensitive Information
CWE-326 Inadequate Encryption Strength
CWE-327 Use of a Broken or Risky Cryptographic Algorithm

References

github.com /WWBN/AVideo/commit/3fdeecef37bb88967a02ccc9b9acc8da95de1c13
web, patch
github.com /WWBN/AVideo/security/advisories/GHSA-mwjc-5j4x-r686
web, exploit, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-33512
advisory
github.com /WWBN/AVideo
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary