High severity · published Sep 2, 2026
CVE-2026-81283
WordPress WP User Frontend plugin <= 4.3.10 - PHP Object Injection vulnerability
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
Subscriber PHP Object Injection in WP User Frontend <= 4.3.10 versions.
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)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WU
WP User Frontend · weDevs
through 4.3.10 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-81283
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-81283
patchstack.com
https://patchstack.com/database/wordpress/plugin/wp-user-frontend/vulnerability/wordpress-wp-user-frontend-plugin-4-3-10-php-object-injection-vulnerability?_s_id=cve
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