WP User Frontend subscribers can trigger PHP object injection
WP User Frontend through 4.3.10 accepts serialized data from Subscriber-level users and can instantiate PHP objects. A usable gadget chain on the site can turn the object-injection primitive into code execution or other high-impact behavior.
- Component
- WP User Frontend
- Plugin slug
wp-user-frontend- Affected
- n/a through 4.3.10
- Safe version
4.3.11- Published
- Sep 02, 2026
This CVE was published Sep 02, 2026 and is one of 19 known issues for this plugin.
Update, patch or deactivate.
Update to 4.3.11 or later, restrict untrusted accounts until updated, and inspect the site for persistence if exploitation is suspected.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
Subscriber PHP Object Injection in WP User Frontend <= 4.3.10 versions.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H