CVE-2026-16537 Slick Slider < 0.5.3 - Contributor+ Stored XSS via Gallery Shortcode
Contributors can inject malicious scripts via gallery shortcodes, leading to stored XSS attacks against site visitors.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-16537?
CVE-2026-16537 is a medium-severity cross-site scripting vulnerability in Unknown Slick Slider, published on 6 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
The Slick Slider WordPress plugin before 0.5.3 does not sanitize and escape a shortcode attribute value before outputting it in an HTML attribute, allowing users with the Contributor role and above to perform Stored Cross-Site Scripting attacks that execute when a user views the affected post.
Weakness: CWE-79
Which versions are affected by CVE-2026-16537?
How do I fix CVE-2026-16537?
No fix has been published for CVE-2026-16537 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-2026-16537 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16537 exists.
Sources
Also known as GHSA-gvvh-735h-j96c.