CVE-2026-17086

The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.5.5 via deserialization of untrusted input . This makes it possible for authenticated attackers, with author-level access and...

CVE-2026-17086 ShortPixel Image Optimizer <= 6.5.5 - Authenticated (Author+) PHP Object Injection via Nested JSON Post Content

The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.5.5 via deserialization of untrusted input . This makes it possible for authenticated attackers, with author-level access and...

EUVD-2026-82653

The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.5.5 via deserialization of untrusted input . This makes it possible for authenticated attackers, with author-level access and...

CVE-2026-17086 ShortPixel Image Optimizer <= 6.5.5 - Authenticated (Author+) PHP Object Injection via Nested JSON Post Content

The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.5.5 via deserialization of untrusted input . This makes it possible for authenticated attackers, with author-level access and...

CVE-2026-17086

The ShortPixel Image Optimizer WordPress plugin (versions

CVE-2026-17086: Deserialization of Untrusted Data

The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.5.5 via deserialization of untrusted input . This makes it possible for authenticated attackers, with author-level access and...

100,000 WordPress Sites Exposed to Remote Code Execution via PHP Object Injection Vulnerability Found by Wordfence Argus in Tutor LMS

On August 23rd, 2026, Wordfence Argus, our AI research agent specializing in complex vulnerability chains, discovered a PHP Object Injection vulnerability in Tutor LMS, a WordPress e-learning plugin active on more than 100,000 websites. This vulnerability allows any authenticated attacker with...

WordPress ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin <= 6.5.5 - Authenticated (Author+) PHP Object Injection vulnerability

Authenticated Author+ PHP Object Injection vulnerability discovered by Josh Bolding in WordPress Plugin ShortPixel Image Optimizer versions = 6.5.5...

CVE-2026-91939

Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize without allowedclasses restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads ...

CVE-2026-91939 Cotonti 1.0.0 Comments Plugin PHP Object Injection via ci Parameter

Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize without allowedclasses restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads ...

CVE-2026-91939 Cotonti 1.0.0 Comments Plugin PHP Object Injection via ci Parameter

Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize without allowedclasses restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads ...

CVE-2026-91939

Cotonti 1.0.0 Comments plugin passes the ci GET parameter directly to unserialize() without an allowed_classes restriction. This allows unauthenticated attackers to inject arbitrary PHP objects via crafted serialized payloads, triggering gadget chains that can lead to database manipulation or rem...

EUVD-2026-80000

Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize without allowedclasses restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads ...

CVE-2026-91939: Deserialization of Untrusted Data

Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize without allowedclasses restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads ...

PT-2026-93177

Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize without allowed classes restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads...

CVE-2026-49400

October System provides the system module for October Content Management System. Prior to versions 3.7.17 and 4.2.21, the backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could...

EUVD-2026-77682

October System provides the system module for October Content Management System. Prior to versions 3.7.17 and 4.2.21, the backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could...

CVE-2026-49400 October CMS: PHP Object Injection via Backend Widget Session Storage

October System provides the system module for October Content Management System. Prior to versions 3.7.17 and 4.2.21, the backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could...

CVE-2026-49400

October CMS (System module) prior to v3.7.17 and v4.2.21 is affected by a PHP object injection vulnerability in the backend SessionMaker trait, which stored widget session state as base64(serialize(...)) and deserialized it with unserialize() without an allowed_classes restriction. Exploitation r...

October CMS: PHP Object Injection via Backend Widget Session Storage

The backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could write to a widget. session key with attacker-controlled bytes could trigger PHP object injection the next time the widg...