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TI-2026-23471 Aliases CVE-2026-30238

Group-Office: Reflected XSS in JavaScript context

Priority MEDIUM 56CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.155, 25.0.88, and 26.0.10, there is a reflected XSS vulnerability in GroupOffice on the external/index flow. The f parameter (Base64 JSON) is decoded and then injected into an inline JavaScript block without strict escaping, allowing </script><script>...</script> injection and arbitrary JavaScript execution in the victim's browser. This issue has been patched in versions 6.8.155, 25.0.88, and 26.0.10.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00314 24th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed groupoffice (Intermesh): 6.8.155, 25.0.88, 26.0.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
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 6.8.155; before 25.0.88; before 26.0.106.8.155, 25.0.88, 26.0.10Patch availableCNA
  • groupoffice VendorIntermesh Affected before 6.8.155; before 25.0.88; before 26.0.10 Fixed in 6.8.155, 25.0.88, 26.0.10 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:intermesh:group-office:*:*:*:*:*:*:*:*before 6.8.155; 25.0.1 to before 25.0.88; 25.2.1 to before 26.0.10VulnerableIntermesh
  • cpe:2.3:a:intermesh:group-office:*:*:*:*:*:*:*:* Versions before 6.8.155; 25.0.1 to before 25.0.88; 25.2.1 to before 26.0.10 Vulnerable ·Intermesh

Remediation

  • Fix · CNA groupoffice (Intermesh) Fixed in 6.8.155, 25.0.88, 26.0.10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-30238

References

Exploit 1

  • TI-2025-30692 GroupOffice's Blind Stored XSS in Phone Number Field Enables Forced Redirect and Unauthorized Actions CVSS 4.0MEDIUM 6.9
  • TI-2025-30694 GroupOffice's DOM-Based XSS in all Date Input Fields Allows Arbitrary JavaScript Execution CVSS 4.0MEDIUM 5.8
  • TI-2025-31121 Group-Office vulnerable to reflected XSS via Look and Feel Formatting input CVSS 4.0MEDIUM 5.3
  • TI-2025-31120 Group-Office vulnerable to blind XSS CVSS 4.0MEDIUM 5.2
  • TI-2025-30695 GroupOffice vulnerable to Stored XSS in Tasks Comment Section CVSS 4.0MEDIUM 5.3
  • TI-2026-27082 Group-Office: Authenticated Remote Code Execution via PHP Insecure Deserialization in `AbstractSettingsCollection` CVSS 3.1CRITICAL 10.0
See all 11 →

Sources

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