CVE-2025-23578 WordPress Custom CSS Addons plugin <= 1.9.1 - Reflected Cross Site Scripting (XSS) vulnerability
Attackers can execute arbitrary scripts in victim browsers via reflected XSS in the Custom CSS Addons plugin for WordPress.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-23578?
CVE-2025-23578 is a high-severity cross-site scripting vulnerability in Bastien Ho Custom CSS Addons, published on 22 Jan 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bastien Ho Custom CSS Addons css-addons allows Reflected XSS.This issue affects Custom CSS Addons: from n/a through <= 1.9.1.
Weakness: CWE-79
Which versions are affected by CVE-2025-23578?
How do I fix CVE-2025-23578?
No fix has been published for CVE-2025-23578 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-2025-23578 being exploited?
There is no known exploitation of CVE-2025-23578 in the wild and no public exploit code.
Sources
Also known as GHSA-9pm6-fvgj-xj4x.