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CVE-2026-23887

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Date: January 21, 2026

Group-Office is an enterprise customer relationship management and groupware tool. In versions 6.8.148 and below, and 25.0.1 through 25.0.79, the application stores unsanitized filenames in the database, which can lead to Stored Cross-Site Scripting (XSS). Users who interact with these specially crafted file names within the Group-Office application are affected. While the scope is limited to the file-viewing context, it could still be used to interfere with user sessions or perform unintended actions in the browser. This issue is fixed in versions 6.8.149 and 25.0.80.

Severity Score

Related Resources (5)

https://nvd.nist.gov/vuln/detail/CVE-2026-23887
https://github.com/Intermesh/groupoffice/commit/3fa40d7edd31fbe33babe07061d5a14ad19ea40f
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-3gj5-gvvr-g6hp
https://github.com/Intermesh/groupoffice/commit/ac91b128157bc9c5ea015b6141ce71cd3bbc43f0
https://www.mend.io/vulnerability-database/CVE-2026-23887

Severity Score

Weakness Type (CWE)

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-79

Improper Input Validation

CWE-20

Top Fix

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Upgrade Version

Upgrade to version https://github.com/Intermesh/groupoffice.git - v25.0.80;https://github.com/Intermesh/groupoffice.git - v6.8.149

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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