High severity · published Sep 2, 2026
CVE-2026-19116
WP User Frontend < 4.3.11 - Subscriber+ PHP Object Injection via Frontend Post Edit Form
8.8
CVSS
0.7%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UF
User Frontend ·
before 4.3.11 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-19116
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-19116
wpscan.com
https://wpscan.com/vulnerability/019d83bd-24d3-4575-9d0b-55f75fdb0bfa/
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