CVE-2025-11819 WP-Thumbnail <= 1.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
Authenticated attackers can inject arbitrary scripts via the roboshot shortcode, executing them when other users view the page.
- 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-2025-11819?
CVE-2025-11819 is a medium-severity cross-site scripting vulnerability in robocasters WP-Thumbnail, published on 22 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The WP-Thumbnail plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'roboshot' shortcode in all versions up to, and including, 1.1. This is due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-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-2025-11819?
How do I fix CVE-2025-11819?
No fix has been published for CVE-2025-11819 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-2025-11819 being exploited?
There is no known exploitation of CVE-2025-11819 in the wild and no public exploit code.
Sources
Also known as GHSA-r778-25p6-xc2v.