CVE-2026-45551: medium-severity vulnerability in Intermesh groupoffice
Group-Office: Authenticated Stored XSS in Administrator Context via Arbitrary Cross-User Setting Write
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.1epss 0.2%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Affected products
Intermesh · groupofficeRelated CVEs — Intermesh groupoffice
In the same product, most dangerous first.
CVE-2026-25512CRITICALGroup-Office is vulnerable to RCE due to Command Injection via TNEF Attachment HandlerEPSS 19.9%CVE-2026-34838CRITICALGroup-Office: Authenticated Remote Code Execution via PHP Insecure Deserialization in `AbstractSettingsCollection`EPSS 1.0%CVE-2026-25134CRITICALGroup-Office Argument Injection in MaintenanceController::actionZipLanguageEPSS 0.9%CVE-2026-27947CRITICALGroup-Office Vulnerable to Remote Code Execution (RCE)EPSS 0.8%CVE-2023-46730HIGHServer-Side Request Forgery in groupoffice EPSS 0.7%CVE-2026-25511HIGHGroup-Office is vulnerable to SSRF and File Read in WOPI service discoveryEPSS 0.4%