CVE-2026-25511: Group-Office Group Office

Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days.

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.150, 25.0.82, and 26.0.5, an authenticated user within the System Administrator group can trigger a full SSRF via the WOPI service discovery URL, including access to internal hosts/ports. The SSRF response body can be exfiltrated via the built‑in debug system, turning it into a visible SSRF. This also allows full server-side file read. This issue has been patched in versions 6.8.150, 25.0.82, and 26.0.5.

Affected products

• Group-Office Group Office: from 6.8.0, before 6.8.150 (fixed in 6.8.150); from 25.0.1, before 25.0.82 (fixed in 25.0.82); from 26.0.1, before 26.0.5 (fixed in 26.0.5)

Published 2026-02-04. Last modified 2026-06-17.