{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "6.8.167"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "25.0.102"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "26.0.27"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "original_tag": "v25.0.102",
                "range": [
                  {
                    "fixed": "45fa6ba3c0478aabb5dec54c8aaa05d769a8323e"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "v26.0.27",
                "range": [
                  {
                    "fixed": "1c697135298f8a70db6d8246b6c87bb206532809"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "v6.8.167",
                "range": [
                  {
                    "fixed": "cd176228237125489c4dafc3a474e7412ecae65d"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "cd176228237125489c4dafc3a474e7412ecae65d"
            },
            {
              "fixed": "45fa6ba3c0478aabb5dec54c8aaa05d769a8323e"
            },
            {
              "fixed": "1c697135298f8a70db6d8246b6c87bb206532809"
            }
          ],
          "repo": "https://github.com/intermesh/groupoffice",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-4m9w-3p93-6cwx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-184",
      "CWE-94",
      "CWE-95"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63011.json"
  },
  "details": "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.",
  "id": "CVE-2026-63011",
  "modified": "2026-11-11T10:30:50.957591642Z",
  "published": "2026-11-10T16:35:37.835Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63011.json"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Intermesh/groupoffice/releases/tag/v25.0.102"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Intermesh/groupoffice/releases/tag/v26.0.27"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Intermesh/groupoffice/releases/tag/v6.8.167"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Intermesh/groupoffice/security/advisories/GHSA-4m9w-3p93-6cwx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63011"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "GroupOffice Vulnerable to RCE in TemplateParser eval() via Contact/labels"
}