CVE-2026-30237
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Tags
Description
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 the GroupOffice installer, endpoint install/license.php. The POST field license is rendered without escaping inside a <textarea>, allowing a </textarea><script>...</script> breakout.. This issue has been patched in versions 6.8.155, 25.0.88, and 26.0.10.
Analysis
Reflected cross-site scripting in GroupOffice installer versions prior to 6.8.155, 25.0.88, and 26.0.10 allows unauthenticated attackers to inject arbitrary scripts through the license parameter in install/license.php. Public exploit code exists for this vulnerability, enabling attackers to execute malicious JavaScript in users' browsers with moderate impact to confidentiality and integrity. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
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External POC / Exploit Code
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