Vulnerability · Published Aug 29, 2026 · Assigned by WPScan

CVE-2026-76547Profile Builder < 4.0.1 - Admin+ PHP Object Injection via Import/Export

Medium 6.6

In plain English

A medium-severity unsafe deserialization in User Profile Builder from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)6.6Medium

Exploit odds (30 days)0.4%top 63.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling1Public PoC

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 .

Affected products (as reported)

Vendor	Product	Versions
Unknown	User Profile Builder	3.3.4 – before 4.0.1

Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

References

https://wpscan.com/vulnerability/b80151f4-e910-4263-9ecc-470fb39d7583/ exploit, vdb-entry, technical-description