Medium severity · published Feb 4, 2026
CVE-2026-25511
Group-Office is vulnerable to SSRF and File Read in WOPI service discovery
4.9
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
groupoffice · Intermesh
< 6.8.150; < 25.0.82; < 26.0.5 · source: vendor
GO
Group Office · Group-office
6.8.0 before 6.8.150; 25.0.1 before 25.0.82; 26.0.1 before 26.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25511
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25511
Patch
https://github.com/Intermesh/groupoffice/commit/5ac199dce758e1ce0d1cdb6905df5da3c2af42b3
Exploit
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-r9v4-jm2r-r9pm
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