CVE-2026-30238
Received Received - Intake
Reflected XSS in Group-Office External Index 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 GroupOffice on the external/index flow. The f parameter (Base64 JSON) is decoded and then injected into an inline JavaScript block without strict escaping, allowing </script><script>...</script> injection and arbitrary JavaScript execution in the victim's browser. 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
2026-06-14
NVD
CVE-2026-30238
EUVD
EUVD-2026-10080
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 Group-Office, an enterprise customer relationship management and groupware tool. It occurs in the external/index flow where the 'f' parameter, which is a Base64 encoded JSON, is decoded and then injected into an inline JavaScript block without proper escaping. This allows an attacker to inject malicious script tags (e.g., </script><script>...</script>) that execute arbitrary JavaScript code in the victim's browser.

The vulnerability affects versions 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 the victim's browser. This can lead to several impacts including theft of sensitive information such as cookies or session tokens, performing actions on behalf of the user without their consent, or redirecting the user to malicious websites.

Compliance Impact

I don't know

Detection Guidance

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Mitigation Strategies

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

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