CVE-2026-30237
Reflected XSS in Group-Office Installer Allows Script Injection
Publication date: 2026-03-06
Last updated on: 2026-03-11
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update Group-Office to one of the patched versions: 6.8.155, 25.0.88, or 26.0.10.