CVE-2025-39354 WordPress Grand Conference theme <= 5.3 - PHP Object Injection vulnerability
An attacker can exploit PHP object injection in the Grand Conference theme to potentially execute arbitrary code on the WordPress site.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-39354?
CVE-2025-39354 is a critical unsafe deserialization vulnerability in ThemeGoods Grand Conference, published on 19 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Conference grandconference allows Object Injection.This issue affects Grand Conference: from n/a through <= 5.3.
Weakness: CWE-502
Which versions are affected by CVE-2025-39354?
It affects 1 product.
Products include Themegoods Grand Conference.
How do I fix CVE-2025-39354?
No fix has been published for CVE-2025-39354 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-2025-39354 being exploited?
There is no known exploitation of CVE-2025-39354 in the wild and no public exploit code.
Other vulnerabilities in ThemeGoods Grand Conference
Sources
Also known as GHSA-p5p2-m2mh-3r9v.