CVE-2026-28695 Craft affected by authenticated RCE via Twig SSTI - create() function + Symfony Process gadget

Craft is a content management system CMS. There is an authenticated admin RCE in Craft CMS 5.8.21 via Server-Side Template Injection using the create Twig function combined with a Symfony Process gadget chain. The create Twig function exposes Craft::createObject, which allows instantiation of...

CVE-2026-28695

Summary of CVE-2026-28695 : Craft CMS 5.8.21 is vulnerable to an authenticated RCE via Server-Side Template Injection using the Twig create() function to trigger a Symfony Process gadget chain. The create() function exposes Craft::createObject(), enabling instantiation of arbitrary PHP classes wi...

CVE-2026-28695 Craft affected by authenticated RCE via Twig SSTI - create() function + Symfony Process gadget

Craft is a content management system CMS. There is an authenticated admin RCE in Craft CMS 5.8.21 via Server-Side Template Injection using the create Twig function combined with a Symfony Process gadget chain. The create Twig function exposes Craft::createObject, which allows instantiation of...

CVE-2026-28695 Craft affected by authenticated RCE via Twig SSTI - create() function + Symfony Process gadget

Craft is a content management system CMS. There is an authenticated admin RCE in Craft CMS 5.8.21 via Server-Side Template Injection using the create Twig function combined with a Symfony Process gadget chain. The create Twig function exposes Craft::createObject, which allows instantiation of...

CVE-2026-28695

Craft is a content management system CMS. There is an authenticated admin RCE in Craft CMS 5.8.21 via Server-Side Template Injection using the create Twig function combined with a Symfony Process gadget chain. The create Twig function exposes Craft::createObject, which allows instantiation of...

GHSA-W9QG-CHFH-G3Q9 Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave thanks M3dium for reporting...

Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave thanks M3dium for reporting...

EUVD-2026-9357

Concrete CMS below version 9.4.8 is subject to CSRF by a Rogue Administrator using the Anti-Spam Allowlist Group Configuration via groupid parameter which can leads to a security bypass since changes are saved prior to checking the CSRF token. The Concrete CMS security team gave this vulnerabilit...

EUVD-2026-9358

In Concrete CMS below version 9.4.8, a user with permission to edit a page with element Legacy form can perform a stored XSS attack towards high-privilege accounts via the Question field. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with...

GHSA-F4VQ-PJ32-GR4Q Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

In Concrete CMS below version 9.4.8, a Cross-site Scripting XSS vulnerability exists in the "Legacy Form" block. An authenticated user with permissions to create or edit forms e.g., a rogue administrator can inject a persistent JavaScript payload into the options of a multiple-choice question...

Concrete CMS vulnerable to Cross-Site Request Forgery (CSRF)

Concrete CMS below version 9.4.8 is subject to CSRF by a Rogue Administrator using the Anti-Spam Allowlist Group Configuration via groupid parameter which can leads to a security bypass since changes are saved prior to checking the CSRF token. The Concrete CMS security team thanks z3rco for...

Concrete CMS vulnerable to Remote Code Execution by stored PHP object injection

Concrete CMS below version 9.4.8 is vulnerable to Remote Code Execution by stored PHP object injection into the Express Entry List block via the columns parameter. An authenticated administrator can store attacker-controlled serialized data in block configuration fields that are later passed to...

GHSA-GJ26-W59C-29MF Concrete CMS vulnerable to Remote Code Execution by stored PHP object injection

Concrete CMS below version 9.4.8 is vulnerable to Remote Code Execution by stored PHP object injection into the Express Entry List block via the columns parameter. An authenticated administrator can store attacker-controlled serialized data in block configuration fields that are later passed to...

EUVD-2026-9359

In Concrete CMS below version 9.4.8, a stored cross-site scripting XSS vulnerability exists in the "Legacy Form" block. An authenticated user with permissions to create or edit forms e.g., a rogue administrator can inject a persistent JavaScript payload into the options of a multiple-choice...

GHSA-6MXW-2VHF-42G5 Concrete CMS vulnerable to Cross-Site Request Forgery (CSRF)

Concrete CMS below version 9.4.8 is subject to CSRF by a Rogue Administrator using the Anti-Spam Allowlist Group Configuration via groupid parameter which can leads to a security bypass since changes are saved prior to checking the CSRF token. The Concrete CMS security team thanks z3rco for...

Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

In Concrete CMS below version 9.4.8, A stored Cross-site Scripting XSS vulnerability exists in the search block where page names and content are rendered without proper HTML encoding in search results. This allows authenticated, rogue administrators to inject malicious JavaScript through page nam...

Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

In Concrete CMS below version 9.4.8, a Cross-site Scripting XSS vulnerability exists in the "Legacy Form" block. An authenticated user with permissions to create or edit forms e.g., a rogue administrator can inject a persistent JavaScript payload into the options of a multiple-choice question...

GHSA-45FJ-FVMM-XCC5 Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

In Concrete CMS below version 9.4.8, a user with permission to edit a page with element Legacy form can perform a stored XSS attack towards high-privilege accounts via the Question field. The Concrete CMS security team thanks minhnn42, namdi and quanlna2 from VCSLab-Viettel Cyber Security for...

GHSA-MM5F-5RQW-574F Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

In Concrete CMS below version 9.4.8, A stored Cross-site Scripting XSS vulnerability exists in the search block where page names and content are rendered without proper HTML encoding in search results. This allows authenticated, rogue administrators to inject malicious JavaScript through page nam...

CVE-2026-3241

In Concrete CMS below version 9.4.8, a stored cross-site scripting XSS vulnerability exists in the "Legacy Form" block. An authenticated user with permissions to create or edit forms e.g., a rogue administrator can inject a persistent JavaScript payload into the options of a multiple-choice...