CVE-2026-40787 WordPress Quiz And Survey Master plugin <= 11.0.0 - Cross Site Scripting (XSS) vulnerability
Unauthenticated attackers can inject malicious scripts into the Quiz And Survey Master WordPress 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-2026-40787?
CVE-2026-40787 is a high-severity cross-site scripting vulnerability in ExpressTech Quiz And Survey Master, published on 15 Jun 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 Quiz And Survey Master <= 11.0.0 versions.
Weakness: CWE-79
Which versions are affected by CVE-2026-40787?
How do I fix CVE-2026-40787?
No fix has been published for CVE-2026-40787 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-2026-40787 being exploited?
There is no known exploitation of CVE-2026-40787 in the wild and no public exploit code.
Sources
Also known as GHSA-c638-vf62-q5jh.