CVE-2026-15249 Patterns Kit <= 1.0.3 - Contributor+ Stored XSS via YouTube Popup Link
Contributors can inject malicious scripts via YouTube popup links in Patterns Kit, leading to code execution in victim browsers.
- 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-2026-15249?
CVE-2026-15249 is a medium-severity cross-site scripting vulnerability in Unknown Patterns Kit, published on 12 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 Patterns Kit WordPress plugin through 1.0.3 does not escape a link attribute before its client-side script inserts it into the page, allowing users with a role as low as Contributor to store a payload that executes in the browser of a user who views the content and clicks the affected element.
Weakness: CWE-79
Which versions are affected by CVE-2026-15249?
How do I fix CVE-2026-15249?
No fix has been published for CVE-2026-15249 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-2026-15249 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15249 exists.
Sources
Also known as GHSA-m845-p9rf-j6jm.