CVE-2026-30237
Received Received - Intake
Reflected XSS in Group-Office Installer Allows Script Injection

Publication date: 2026-03-06

Last updated on: 2026-03-11

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2026-03-06
Last Modified
2026-03-11
Generated
2026-06-16
AI Q&A
2026-03-07
EPSS Evaluated
2026-06-15
NVD
CVE-2026-30237
EUVD
EUVD-2026-10079
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
intermesh group-office to 6.8.155 (exc)
intermesh group-office From 25.0.1 (inc) to 25.0.88 (exc)
intermesh group-office From 25.2.1 (inc) to 26.0.10 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is a reflected Cross-Site Scripting (XSS) issue in the GroupOffice installer, specifically in the endpoint install/license.php. The problem arises because the POST field 'license' is rendered inside a <textarea> element without proper escaping. This allows an attacker to inject malicious scripts by breaking out of the <textarea> context using a sequence like </textarea><script>...<script>, which can then execute arbitrary JavaScript in the context of the victim's browser.

The vulnerability affects versions of GroupOffice prior to 6.8.155, 25.0.88, and 26.0.10, and has been patched in these versions.

Impact Analysis

This reflected XSS vulnerability can allow attackers to execute arbitrary JavaScript in the context of a user's browser when they interact with the vulnerable installer endpoint. This can lead to various impacts such as theft of session cookies, defacement of the web interface, redirection to malicious sites, or other malicious actions performed on behalf of the user.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, update Group-Office to one of the patched versions: 6.8.155, 25.0.88, or 26.0.10.

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