CVE-2025-23490 WordPress Browser-Update-Notify plugin <= 0.2.1 - Reflected Cross Site Scripting (XSS) vulnerability
An attacker can execute arbitrary scripts in the context of other users' browsers via reflected XSS in the Browser-Update-Notify plugin.
- 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-2025-23490?
CVE-2025-23490 is a high-severity cross-site scripting vulnerability in Michael Stursberg Browser-Update-Notify, published on 3 Mar 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 Michael Stursberg Browser-Update-Notify browser-update-notify allows Reflected XSS.This issue affects Browser-Update-Notify: from n/a through <= 0.2.1.
Weakness: CWE-79
Which versions are affected by CVE-2025-23490?
How do I fix CVE-2025-23490?
No fix has been published for CVE-2025-23490 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-2025-23490 being exploited?
There is no known exploitation of CVE-2025-23490 in the wild and no public exploit code.
Sources
Also known as GHSA-8wxr-c457-gcq8.