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CVE-2026-45551

Group-Office: Authenticated Stored XSS in Administrator Context via Arbitrary Cross-User Setting Write PUBLISHED

Description (CNA)

Group-Office is an enterprise customer relationship management and groupware tool. Prior to 26.0.25, 25.0.100, and 6.8.165, GroupOffice allows authenticated users to persist arbitrary legacy settings for any user_id via index.php?r=core/saveSetting. A separate client-side sink in the email module injects the email_font_size setting directly into JavaScript without escaping. By combining these two issues, any low-privileged authenticated user can overwrite an administrator's email_font_size setting with a JavaScript payload and trigger stored XSS in the administrator's browser when the GroupOffice web client loads views/Extjs3/modulescripts.php. This vulnerability is fixed in 26.0.25, 25.0.100, and 6.8.165.

Affected (CNA)

Vendor / productVersions
Intermesh / groupofficeaffected >= 26.0.1, < 26.0.25; affected >= 25.0.1, < 25.0.1005; affected < 6.8.165

CWE

CWE-79, CWE-639

References

ADP enrichment

CISA-ADP

No English description supplied.