CVE-2026-19698 GutenKit < 2.5.1 - Contributor+ Stored CSS Injection
Contributors can inject arbitrary CSS into pages, enabling defacement and interface redressing for other users and visitors.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-19698?
CVE-2026-19698 is a low-severity cross-site scripting vulnerability in Unknown GutenKit, published on 2 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The GutenKit WordPress plugin before 2.5.1 does not validate or escape style settings saved against a post before using them to build the CSS it outputs on the front end, allowing users with the Contributor role and above to inject arbitrary CSS into pages served to other users and to anonymous visitors. JavaScript execution is not possible at that role, so the impact is limited to defacement, interface redressing and forcing external resources to load.
Weakness: CWE-74
Which versions are affected by CVE-2026-19698?
How do I fix CVE-2026-19698?
No fix has been published for CVE-2026-19698 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-2026-19698 being exploited?
There is no known exploitation of CVE-2026-19698 in the wild and no public exploit code.
Sources
Also known as GHSA-q4xj-fj7m-v23h.