{"affected":[{"product":"groupoffice","source":"CNA: GitHub_M","vendor":"Intermesh","versions":[{"status":"affected","version":"< 6.8.167"},{"status":"affected","version":"< 25.0.102"},{"status":"affected","version":"< 26.0.27"}]}],"cveId":"CVE-2026-63011","cwes":["CWE-94","CWE-95","CWE-184"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":9.4,"severity":"critical","source":"CNA: GitHub_M","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0"},{"score":9.4,"severity":"critical","source":"NVD: security-advisories@github.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"}],"modifiedAt":1794331065980,"publishedAt":1794328537835,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Intermesh/groupoffice/security/advisories/GHSA-4m9w-3p93-6cwx"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/Intermesh/groupoffice/releases/tag/v25.0.102"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/Intermesh/groupoffice/releases/tag/v26.0.27"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/Intermesh/groupoffice/releases/tag/v6.8.167"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/Intermesh/groupoffice/releases/tag/v25.0.102"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/Intermesh/groupoffice/releases/tag/v26.0.27"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/Intermesh/groupoffice/releases/tag/v6.8.167"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/Intermesh/groupoffice/security/advisories/GHSA-4m9w-3p93-6cwx"}],"remediation":[],"revision":"680425b02cf6a220e5b0a22673fe2e40b7b4b3050f30ec0ab0d824aac3af31b8","sources":[{"modifiedAt":1794328537835,"name":"CNA: GitHub_M","retrievedAt":1794330819160,"url":"https://www.cve.org/CVERecord?id=CVE-2026-63011"},{"modifiedAt":1794331065980,"name":"NVD","retrievedAt":1794336325917,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63011"}],"ssvc":null,"status":"published","title":"GroupOffice Vulnerable to RCE in TemplateParser eval() via Contact/labels","updatedAt":1794336325917}