SSRF in Group-Office Group Office
CVE-2026-25511
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.004 (34.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Group-office Group_office
- Intermesh Groupoffice — versions < 6.8.150, < 25.0.82, < 26.0.5
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-25511?
- CVE-2026-25511 is a medium-severity vulnerability in Group-Office Group Office, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.9/10. Published 2026-02-04.
- How severe is CVE-2026-25511?
- Medium severity. CVSS v3 base score is 4.9 out of 10.