CVE-2026-125454 WordPress Passster plugin <= 4.3.21 - Cross Site Scripting (XSS) vulnerability
Attackers can store malicious scripts via the Passster WordPress plugin that execute in visitors' browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-125454?
CVE-2026-125454 is a medium-severity cross-site scripting vulnerability in WP Chill Passster, published on 11 Nov 2026. Any signed-in user can exploit it over the network, 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 WP Chill Passster content-protector allows Stored XSS.This issue affects Passster: from n/a through 4.3.21.
Weakness: CWE-79
Which versions are affected by CVE-2026-125454?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-125454?
No fix has been published for CVE-2026-125454 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-2026-125454 being exploited?
There is no known exploitation of CVE-2026-125454 in the wild and no public exploit code.
Sources
Also known as GHSA-mmh3-q235-rhm5.