CVE-2026-57423 WordPress Message Filter for Contact Form 7 plugin <= 1.6.3.8 - Reflected Cross Site Scripting (XSS) vulnerability
Reflected XSS in WordPress Message Filter for Contact Form 7 plugin allows attackers to inject malicious scripts into web pages viewed by other users.
- 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-2026-57423?
CVE-2026-57423 is a high-severity cross-site scripting vulnerability in Kofi Mokome Message Filter for Contact Form 7, published on 13 Jul 2026. 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 Kofi Mokome Message Filter for Contact Form 7 cf7-message-filter allows Reflected XSS.This issue affects Message Filter for Contact Form 7: from n/a through <= 1.6.3.8.
Weakness: CWE-79
Which versions are affected by CVE-2026-57423?
How do I fix CVE-2026-57423?
No fix has been published for CVE-2026-57423 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-2026-57423 being exploited?
There is no known exploitation of CVE-2026-57423 in the wild and no public exploit code.
Sources
Also known as GHSA-xc3q-vv64-34jj.