AVideo: Unauthenticated CDN Configuration Takeover via Empty Default Key Bypass and Mass-Assignment

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.6 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

EPSS

• CVE-2026-33719: 0.36% estimated exploitation activity in the next 30 days; percentile 30.17 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary The CDN plugin endpoints plugin/CDN/status.json.php and plugin/CDN/disable.json.php use key-based authentication with an empty string default key. When the CDN plugin is enabled but the key has not been configured (the default state), the key validation check is completely bypassed, allowing any unauthenticated attacker to modify the full CDN configuration — including CDN URLs, storage credentials, and the authentication key itself — via mass-assignment through the par request parameter. Details The CDN plugin defines a default empty key in plugin/CDN/CDN.php:68: The status.json.php endpoint authenticates requests using this key, but the check has a critical logic flaw at lines 16-27: When the stored key is the default empty string "", !empty("") evaluates to false, and the entire key comparison block is skipped. Any non-empty value provided by the attacker passes authentication. Following the bypass, lines 28-31 perform unchecked mass-assignment: The attacker-controlled par…

Published by the source

25 Mar 2026, 21:55 UTC

Last modified by the source

25 Mar 2026, 21:55 UTC

Source last checked

26 Oct 2026, 14:39 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-r64r-883r-wcwh

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# Patch Next advisory brief: CVE-2026-33719

Advisory: AVideo: Unauthenticated CDN Configuration Takeover via Empty Default Key Bypass and Mass-Assignment
IDs: CVE-2026-33719, GHSA-r64r-883r-wcwh
Record: https://patchnext.com/advisories/cve-2026-33719 (revision 1, source checked 26 Oct 2026, 14:39 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist wwbn/avideo: affected <= 26.0

## Suggested inspection (read-only)
- Packagist wwbn/avideo: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on wwbn/avideo.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-r64r-883r-wcwh (GitHub-reviewed advisory GHSA-r64r-883r-wcwh lists affected ranges: Packagist wwbn/avideo >=0 <=26.0)

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