CVE-2026-5361 Envira Gallery <= 1.12.4 - Authenticated (Author+) Stored Cross-Site Scripting via 'arrows' Parameter
Authenticated attackers can inject arbitrary scripts via the arrows parameter, leading to stored XSS execution on victim pages.
- 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-2026-5361?
CVE-2026-5361 is a medium-severity cross-site scripting vulnerability in smub Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Envira Gallery Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in versions up to and including 1.12.4. This is due to insufficient input sanitization in the update_gallery_data() function and improper output escaping in the gallery_init() function. The sanitize_config_values() function only sanitizes the justified_gallery_theme and justified_row_height parameters, but does not sanitize the arrows parameter. When the arrows value is output in the inline JavaScript configuration, it uses esc_attr() which is designed for HTML attribute contexts, not JavaScript contexts, allowing JavaScript expression injection. 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 an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-5361?
How do I fix CVE-2026-5361?
No fix has been published for CVE-2026-5361 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-2026-5361 being exploited?
There is no known exploitation of CVE-2026-5361 in the wild and no public exploit code.
Sources
Also known as GHSA-fm2p-2whf-w32j.