CVE-2026-19116
High
Description
The User Frontend WordPress plugin before 4.3.11 does not prevent user-supplied field values from being deserialized when a submitted post is reopened in its frontend editing form, allowing authenticated users with subscriber-level access and above to perform PHP Object Injection, which may lead to remote code execution when a suitable gadget chain is present on the site.
SeverityHigh
CVSS8.8
Exploit probability—
ProductUser Frontend
PublishedSep 2, 2026
First seenSep 2, 2026
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Update
- User Frontend4.3.11 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| User Frontend | v < 4.3.11 | 4.3.11 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.