AVideo has an authenticated arbitrary local file read via `chunkFile` path injection in `aVideoEncoder.json.php`

published 2026-03-19 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-20076 , GHSA-4jw9-5hrc-m4j6

cvss: 7.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits: 0; none known

WWBN AVideo is an open source video platform. In versions up to and including 26.0, `POST /objects/aVideoEncoder.json.php` accepts a requester-controlled `chunkFile` parameter intended for staged upload chunks. Instead of restricting that path to trusted server-generated chunk locations, the endpoint accepts arbitrary local filesystem paths that pass `isValidURLOrPath()`. That helper allows files under broad server directories including `/var/www/`, the application root, cache, tmp, and `videos`, only rejecting `.php` files. For an authenticated uploader editing their own video, this becomes an arbitrary local file read. The endpoint copies the attacker-chosen local file into the attacker's public video storage path, after which it can be downloaded over HTTP. Commit 59bbd601a3f65a5b18c1d9e4eb11471c0a59214f contains a patch for the issue.

Patch / fix

links 1

github.com/WWBN/AVideo@59bbd60 commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 7 mo ago (2026-03-25)

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/WWBN/AVideo/security/advisories/GHSA-4jw9-5hrc-m4j6 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.6	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
GitHub	3.1	7.6	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/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-73 External Control of File Name or Path

References

github.com /WWBN/AVideo/commit/59bbd601a3f65a5b18c1d9e4eb11471c0a59214f
web, patch
github.com /WWBN/AVideo/security/advisories/GHSA-4jw9-5hrc-m4j6
web, exploit, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-33354
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