AVideo: CSRF on emailAllUsers.json.php Enables Mass Phishing Email to All Users

Exploitation

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

CVSS

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

EPSS

• CVE-2026-34611: 0.16% estimated exploitation activity in the next 30 days; percentile 5.22 (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 AVideo endpoint objects/emailAllUsers.json.php allows administrators to send HTML emails to every registered user on the platform. While the endpoint verifies admin session status, it does not validate a CSRF token. Because AVideo sets SameSite=None on session cookies, a cross-origin POST request from an attacker-controlled page will include the admin's session cookie automatically. An attacker who lures an admin to a malicious page can send an arbitrary HTML email to every user on the platform, appearing to originate from the instance's legitimate SMTP address. The endpoint does not call save() on any ORM object, which means the Referer/Origin domain validation implemented in ObjectYPT::save() is never triggered, leaving CSRF as the only required protection - and it is absent. Details The endpoint performs an admin check at line 10 but has no CSRF token validation: The message body is taken directly from POST data at line 41: The message is rendered as HTML in the email…

Published by the source

1 Apr 2026, 20:48 UTC

Last modified by the source

1 Apr 2026, 20:48 UTC

Source last checked

26 Oct 2026, 14:39 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-c4xj-x7p8-3x7q

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# Patch Next advisory brief: CVE-2026-34611

Advisory: AVideo: CSRF on emailAllUsers.json.php Enables Mass Phishing Email to All Users
IDs: CVE-2026-34611, GHSA-c4xj-x7p8-3x7q
Record: https://patchnext.com/advisories/cve-2026-34611 (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: Medium (CVSS 6.5)
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-c4xj-x7p8-3x7q (GitHub-reviewed advisory GHSA-c4xj-x7p8-3x7q lists affected ranges: Packagist wwbn/avideo >=0 <=26.0)

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