CVE-2026-12123

All-in-One Video Gallery <= 4.8.5 - Authenticated (Subscriber+) Server-Side Request Forgery via 'vdl' Parameter

2026-07-09 16:59
KoreaInfoSec

Strategic Overview

Status
Patched in 4.9.0
Affected Version
<= 4.8.5
CVSS
6.4Medium
Weakness type
CWE-918 · Server-Side Request Forgery (SSRF)
CVE
CVE-2026-12123
View all All-in-One Video Gallery – Video Player & Galleries for YouTube, Vimeo & Self-Hosted Videos vulnerabilities

At a glance

CVE-2026-12123 is a medium-severity Server-Side Request Forgery (SSRF) vulnerability in the All-in-One Video Gallery WordPress plugin, affecting versions <= 4.8.5. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 4.9.0; sites on affected versions should update now. Disclosed July 2026, reported by KoreaInfoSec.

Vulnerability Overview

The All-in-One Video Gallery plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 4.8.5 via the 'vdl' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services. A Subscriber-level attacker can plant an internal or loopback URL in the `mp4` post meta of a newly created `aiovg_videos` post via XML-RPC `wp.newPost`, then trigger the unauthenticated `?vdl=<post_id>` endpoint to force the server to fetch that URL and stream the full response body back to the requester.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-918: Server-Side Request Forgery (SSRF)

All-in-One Video Gallery <= 4.8.5 carries this weakness at vdl, and reaching it takes an account at Subscriber level or above. Server-side request forgery means the application fetches a URL supplied by the caller, turning the server into a proxy for requests the attacker could not make directly.

The request originates from inside the hosting network, which is how these flaws reach cloud metadata endpoints, internal admin panels and services that trust local traffic. For All-in-One Video Gallery the fix is 4.9.0: builds <= 4.8.5 are affected, anything from 4.9.0 onward is not.

Remediation

Update to version 4.9.0, or a newer patched version

How does WordSec protect against this?

An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: All-in-One Video Gallery 4.9.0 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

Related records

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