Vulnerability · Published Jun 17, 2026 · Assigned by Patchstack
CVE-2026-39573WordPress Mildhill theme <= 1.5 - PHP Object Injection vulnerability
High 8.1
In plain English
A high-severity unsafe deserialization in Mildhill from Select-Themes. 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 34% of all known vulnerabilities).
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.4%top 66.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Unauthenticated PHP Object Injection in Mildhill <= 1.5 versions.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Select-Themes | Mildhill | n/a – through 1.5 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H