CVE-2026-63011

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.167, 25.0.102, and 26.0.27, the Contact/labels JMAP endpoint in GroupOffice accepts a fully attacker-controlled template string (tpl parameter) that is passed without restriction to TemplateParser::parse(). When the template contains an [assign] block whose expression includes a {{...}} variable reference, the engine calls eval() on the expanded expression after running it through a validateExpression() guard. The guard double-quotes unrecognized tokens, but PHP 7+ allows a string enclosed in parentheses to be invoked as a function ("system")("id") is valid PHP and calls system("id"). A single authenticated HTTP request is sufficient to execute arbitrary OS commands as the web server user (www-data). This issue has been patched in versions 6.8.167, 25.0.102, and 26.0.27.

• CWE-94
• CWE-95
• CWE-184

• https://github.com/Intermesh/groupoffice/releases/tag/v25.0.102
• https://github.com/Intermesh/groupoffice/releases/tag/v26.0.27
• https://github.com/Intermesh/groupoffice/releases/tag/v6.8.167
• https://github.com/Intermesh/groupoffice/security/advisories/GHSA-4m9w-3p93-6cwx

Published

Nov 10, 2026

Last Modified

Nov 12, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-63002REDAXO is a PHP-based content management system. Prior to 5.…4.8
• CVE-2026-63003django CMS is an easy-to-use and developer-friendly enterpri…6.5
• CVE-2026-63004Unleash is an open-source feature management platform. Prior…5.5
• CVE-2026-63006Zammad is a web based open source helpdesk/customer support …5.3
• CVE-2026-6301Type Confusion in Turbofan in Google Chrome prior to 147.0.7…8.8
• CVE-2026-63010Group-Office is an enterprise customer relationship manageme…8.7
• CVE-2026-63015Uncontrolled Resource Consumption vulnerability in Apache In…4.3
• CVE-2026-63016Uncontrolled Resource Consumption vulnerability in Apache In…5.3
• CVE-2026-63017Incorrect authorization in PowerSYSTEM Center allows a low-p…9
• CVE-2026-63018Integer underflow (wrap or wraparound) for some Intel(R) Met…4.8
• CVE-2026-6302Use after free in Video in Google Chrome prior to 147.0.7727…8.8
• CVE-2026-63020A vulnerability exists in an undisclosed BIG-IP Configuratio…3.1