CVE-2026-104392 WordPress Quiz And Survey Master plugin <= 11.2.7 - PHP Object Injection vulnerability
An attacker can exploit PHP object injection in the Quiz And Survey Master plugin to potentially execute arbitrary code on the WordPress site.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104392?
CVE-2026-104392 is a high-severity unsafe deserialization vulnerability in ExpressTech Quiz And Survey Master, published on 9 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Deserialization of Untrusted Data vulnerability in ExpressTech Quiz And Survey Master quiz-master-next allows Object Injection.This issue affects Quiz And Survey Master: from n/a through 11.2.7.
Weakness: CWE-502
Which versions are affected by CVE-2026-104392?
How do I fix CVE-2026-104392?
No fix has been published for CVE-2026-104392 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-104392 being exploited?
There is no known exploitation of CVE-2026-104392 in the wild and no public exploit code.
Sources
Also known as GHSA-hvrj-fvj7-h84q.