CVE-2026-56037 WordPress Themify Popup plugin <= 1.4.3 - PHP Object Injection vulnerability
An attacker can exploit PHP object injection in the Themify Popup 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-2026-56037?
CVE-2026-56037 is a high-severity unsafe deserialization vulnerability in Themify Popup, published on 2 Jul 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 Themify Themify Popup allows Object Injection.
This issue affects Themify Popup: from n/a through 1.4.3.
Weakness: CWE-502
Which versions are affected by CVE-2026-56037?
How do I fix CVE-2026-56037?
No fix has been published for CVE-2026-56037 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-2026-56037 being exploited?
There is no known exploitation of CVE-2026-56037 in the wild and no public exploit code.
Sources
Also known as GHSA-2vg7-9fw4-fmph.