CVE-2026-30238: Intermesh Group-Office

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.155, 25.0.88, and 26.0.10, there is a reflected XSS vulnerability in GroupOffice on the external/index flow. The f parameter (Base64 JSON) is decoded and then injected into an inline JavaScript block without strict escaping, allowing </script><script>...</script> injection and arbitrary JavaScript execution in the victim's browser. This issue has been patched in versions 6.8.155, 25.0.88, and 26.0.10.

Affected products

• Intermesh Group-Office: before 6.8.155 (fixed in 6.8.155); from 25.0.1, before 25.0.88 (fixed in 25.0.88); from 25.2.1, before 26.0.10 (fixed in 26.0.10)

Published 2026-03-06. Last modified 2026-06-17.