Medium severity · published Jan 21, 2026
CVE-2026-23887
Group-Office has stored XSS vulnerability via unsanitized filenames
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
groupoffice · Intermesh
< 6.8.149; >= 25.0.1, < 25.0.80 · source: vendor
GO
Group Office · Group-office
before 6.8.149; 25.0.1 before 25.0.80 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23887
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-23887
Patch
https://github.com/Intermesh/groupoffice/commit/3fa40d7edd31fbe33babe07061d5a14ad19ea40f
Patch
https://github.com/Intermesh/groupoffice/commit/ac91b128157bc9c5ea015b6141ce71cd3bbc43f0
Exploit
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-3gj5-gvvr-g6hp
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