Vulnerability · Published Aug 20, 2026 · Assigned by Patchstack
CVE-2026-66583WordPress Forminator plugin <= 1.57.0 - PHP Object Injection vulnerability
Critical 9.8
In plain English
A critical-severity unsafe deserialization in Forminator from WPMU DEV. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 53.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Unauthenticated PHP Object Injection in Forminator <= 1.57.0 versions.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WPMU DEV | Forminator | n/a – through 1.57.0 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H