ValidFormBuilder version 4.5.4 contains a PHP Object Injection vulnerability in Valid Form unserialize method that can result in Possible to execute unauthorised system commands remotely and disclose file contents in file system.
Severity
CVSS 3.0
9.8 critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
1.6% chance of exploitation in the next 30 days; higher than 76% of CVEs (scores of 2026-10-31)