CVE-2026-76547 Profile Builder < 4.0.1 - Admin+ PHP Object Injection via Import/Export
Administrators can trigger PHP object injection via import/export in a disabled add-on, potentially leading to code execution if a gadget chain exists.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76547?
CVE-2026-76547 is a medium-severity unsafe deserialization vulnerability in Unknown User Profile Builder, published on 29 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The User Profile Builder WordPress plugin before 4.0.1 does not validate the type of data being deserialized when importing a configuration file, allowing high privilege users such as administrators to conduct PHP Object Injection. The affected feature is a free add-on which is disabled by default, and no POP chain is present in the User Profile Builder WordPress plugin before 4.0.1 itself, so further impact requires a suitable gadget from another installed User Profile Builder WordPress plugin before 4.0.1 or .
Weakness: CWE-502
Which versions are affected by CVE-2026-76547?
How do I fix CVE-2026-76547?
No fix has been published for CVE-2026-76547 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-2026-76547 being exploited?
There is no known exploitation of CVE-2026-76547 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-w8mx-gm67-wrqq.