CVE-2026-65438 WordPress Message Filter for Contact Form 7 plugin <= 1.6.3.9 - Cross Site Scripting (XSS) vulnerability
Unauthenticated attackers can inject malicious scripts via the Message Filter for Contact Form 7 plugin, potentially compromising user sessions.
- 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-2026-65438?
CVE-2026-65438 is a high-severity cross-site scripting vulnerability in Kofi Mokome Message Filter for Contact Form 7, published on 27 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
Unauthenticated Cross Site Scripting (XSS) in Message Filter for Contact Form 7 <= 1.6.3.9 versions.
Weakness: CWE-79
Which versions are affected by CVE-2026-65438?
How do I fix CVE-2026-65438?
No fix has been published for CVE-2026-65438 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-2026-65438 being exploited?
There is no known exploitation of CVE-2026-65438 in the wild and no public exploit code.
Sources
Also known as GHSA-frq5-3q8h-cgc3.