Vulnerability · Published Jun 16, 2026 · Assigned by Patchstack
CVE-2026-54194WordPress Fusion Builder plugin <= 3.15.4 - PHP Object Injection vulnerability
Critical 9.8
In plain English
A critical-severity unsafe deserialization in Fusion Builder from ThemeFusion. 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 32% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.4%top 68.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Contributor PHP Object Injection in Fusion Builder <= 3.15.4 versions.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ThemeFusion | Fusion Builder | n/a – through 3.15.4 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H