Is CVE-2026-81283 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-81283 being exploited in the wild.

How severe is CVE-2026-81283?

High severity, with a CVSS score of 8.8, published 2 September 2026.

Which products and versions are affected?

weDevs WP User Frontend <=4.3.10.

Is there a fix for CVE-2026-81283?

A patch was published on 2026-09-01: Version 4.3.11 released as patch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-81283 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-81283?

Check whether you run weDevs WP User Frontend at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-81283: WP User Frontend PHP object injection vulnerability

Q: Is there a fix for CVE-2026-81283?

A patch was published on 2026-09-01: Version 4.3.11 released as patch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-81283 attacked?

It is attacked over the network, in a web application.

Q: Am I affected by CVE-2026-81283?

Check whether you run weDevs WP User Frontend at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-81283 · Severity: high · CVSS 8.8 · Published 2026-09-02

WP User Frontend is a popular WordPress plugin used to create user registration forms, membership sites, and frontend content submission. A PHP object injection vulnerability in versions 4.3.10 and earlier allows attackers with subscriber-level access to manipulate how the site processes data and execute arbitrary code on the server, potentially compromising the entire WordPress site.

Technologies: weDevs WP User Frontend. Vendors: weDevs.

Quick answers

Is CVE-2026-81283 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-81283 being exploited in the wild.
How severe is CVE-2026-81283?: High severity, with a CVSS score of 8.8, published 2 September 2026.
Which products and versions are affected?: weDevs WP User Frontend <=4.3.10.
Is there a fix for CVE-2026-81283?: A patch was published on 2026-09-01: Version 4.3.11 released as patch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-81283 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-81283?: Check whether you run weDevs WP User Frontend at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This vulnerability is a PHP object injection flaw in WP User Frontend affecting versions up to 4.3.10. The vulnerability allows subscribers (authenticated users with limited privileges) to inject malicious serialized PHP objects that get deserialized without proper sanitization, leading to remote code execution on the web server. The attack requires an authenticated subscriber account but no elevated privileges. Patchstack has published a mitigation rule to block exploitation attempts, and the vendor released version 4.3.11 as a fix. Note: This vulnerability has also been assigned CVE-2026-19116 by another CVE Numbering Authority.

Affected products

weDevs WP User Frontend <=4.3.10

Timeline

2026-09-02: disclosed
2026-09-01: patched: Version 4.3.11 released as patch
2026-09-01: advisory: Patchstack published mitigation rule

References

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