Read the docs
TI-2026-20621 Aliases CVE-2026-25511

Group-Office is vulnerable to SSRF and File Read in WOPI service discovery

Priority HIGH 75CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00439 38th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed groupoffice (Intermesh): 6.8.150, 25.0.82, 26.0.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Intermeshgroupofficebefore 6.8.150; before 25.0.82; before 26.0.56.8.150, 25.0.82, 26.0.5Patch availableCNA
  • groupoffice VendorIntermesh Affected before 6.8.150; before 25.0.82; before 26.0.5 Fixed in 6.8.150, 25.0.82, 26.0.5 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:group-office:group_office:*:*:*:*:*:*:*:*6.8.0 to before 6.8.150; 25.0.1 to before 25.0.82; 26.0.1 to before 26.0.5VulnerableGroup-office
  • cpe:2.3:a:group-office:group_office:*:*:*:*:*:*:*:* Versions 6.8.0 to before 6.8.150; 25.0.1 to before 25.0.82; 26.0.1 to before 26.0.5 Vulnerable ·Group-office

Remediation

  • Fix · CNA groupoffice (Intermesh) Fixed in 6.8.150, 25.0.82, 26.0.5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25511

References

Exploit 1

Patch 1

  • TI-2026-20622 Group-Office is vulnerable to RCE due to Command Injection via TNEF Attachment Handler CVSS 4.0CRITICAL 9.4
  • TI-2018-16194 Path traversal in Intermesh Group-Office lets attackers read files CVSS 4.0HIGH 8.7
  • TI-2023-25213 Server-Side Request Forgery in groupoffice CVSS 3.1HIGH 8.8
  • TI-2025-30692 GroupOffice's Blind Stored XSS in Phone Number Field Enables Forced Redirect and Unauthorized Actions CVSS 4.0MEDIUM 6.9
  • TI-2025-18860 Group-Office has a Stored XSS Vulnerability via user's name field CVSS 4.0MEDIUM 6.9
  • TI-2025-30694 GroupOffice's DOM-Based XSS in all Date Input Fields Allows Arbitrary JavaScript Execution CVSS 4.0MEDIUM 5.8
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences