CVE-2026-3423 Envira Gallery <= 1.12.4 - Authenticated (Author+) Stored Cross-Site Scripting via Gallery Description
Authenticated attackers with Author access can inject arbitrary scripts via gallery descriptions, leading to code execution when users view the gallery.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3423?
CVE-2026-3423 is a medium-severity cross-site scripting vulnerability in smub Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More, published on 28 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Envira Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the gallery 'description' configuration field in all versions up to, and including, 1.12.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses a page displaying the gallery with a description enabled.
Weakness: CWE-79
Which versions are affected by CVE-2026-3423?
How do I fix CVE-2026-3423?
No fix has been published for CVE-2026-3423 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-3423 being exploited?
There is no known exploitation of CVE-2026-3423 in the wild and no public exploit code.
Sources
Also known as GHSA-rj2v-3ccg-83gv.