What’s Vulnerable › Vulnerabilities

CVE-2026-25511: Group-Office is vulnerable to SSRF and File Read in WOPI service discovery

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-04 · updated 2026-06-17
• Weakness: CWE-918

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.

Affected products

• Intermesh groupoffice: from 6.8.0 before 6.8.150; from 25.0.1 before 25.0.82; from 26.0.1 before 26.0.5 — fixed in 25.0.82, 26.0.5, 6.8.150

How to fix

Upgrade to a fixed version: Intermesh groupoffice 25.0.82, 26.0.5, 6.8.150. Check the vendor advisory for mitigations.

References

• https://github.com/Intermesh/groupoffice/commit/5ac199dce758e1ce0d1cdb6905df5da3c2af42b3
• https://github.com/Intermesh/groupoffice/security/advisories/GHSA-r9v4-jm2r-r9pm
• https://github.com/Intermesh/groupoffice/security/advisories/GHSA-r9v4-jm2r-r9pm

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