CVE-2026-19116: CWE-502 Deserialization of Untrusted Data in User Frontend
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.
CVSS v3.1
Score 8.8high
Affected software
User Frontend
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The User Frontend WordPress plugin versions prior to 4.3.11 do not properly prevent user-supplied field values from being deserialized when a submitted post is reopened in the frontend editing interface. This flaw enables authenticated users with subscriber-level privileges or higher to perform PHP Object Injection attacks. Successful exploitation may result in remote code execution if the site contains an appropriate gadget chain. The vulnerability is tracked as CVE-2026-19116 and is classified under CWE-502 (Deserialization of Untrusted Data).
Potential Impact
An attacker with subscriber-level access or higher can exploit this vulnerability to inject malicious PHP objects via deserialization, potentially leading to remote code execution. This compromises the confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict subscriber-level user capabilities where possible and monitor for suspicious activity related to post editing in the frontend.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-06T14:36:33.718Z
- State
- PUBLISHED
Threat ID: 6a97bd31acd9273b49d9bb97
Added to database: 09/02/2026, 06:07:45 UTC
Last enriched: 09/07/2026, 14:05:03 UTC
Last updated: 10/17/2026, 18:48:17 UTC
Views: 57
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