What’s Vulnerable › Vulnerabilities
CVE-2026-19698: GutenKit < 2.5.1 - Contributor+ Stored CSS Injection
- Severity: low (CVSS 3.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-02 · updated 2026-09-03
- Weakness: CWE-74
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.
Affected products
- GutenKit: before 2.5.1 — fixed in 2.5.1
How to fix
Upgrade to a fixed version: GutenKit 2.5.1. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-19698 or the next vulnerability affects your stack