CVE-2025-13311 Just Highlight <= 1.0.3 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Highlight Color' Setting
Administrators can inject arbitrary scripts via the Highlight Color setting, leading to stored XSS execution on the settings page.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-13311?
CVE-2025-13311 is a medium-severity cross-site scripting vulnerability in sigalitam Just Highlight, published on 25 Nov 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Just Highlight plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Highlight Color' setting in all versions up to, and including, 1.0.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the plugin's settings page.
Weakness: CWE-79
Which versions are affected by CVE-2025-13311?
How do I fix CVE-2025-13311?
No fix has been published for CVE-2025-13311 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-2025-13311 being exploited?
There is no known exploitation of CVE-2025-13311 in the wild and no public exploit code.
Sources
Also known as GHSA-cq42-27g7-j8cw.