Medium 5.1Published Jan 21, 2026

CVE-2026-23887Group-Office has stored XSS vulnerability via unsanitized filenames

Updated under an hour ago (Oct 28, 2026, 1:40 AM ET)

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It affects Intermesh groupoffice and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Intermesh groupoffice

Exploited in the last 30 days

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: 5.1 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-79, CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jan 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Intermesh groupoffice intermesh:groupoffice (from the name)	before 6.8.149; from 25.0.1, < 25.0.80	CNA record
group-office group_office group-office:group_office	before 6.8.149; from 25.0.1 before 25.0.80	NVD

References

References

https://github.com/Intermesh/groupoffice/security/advisories/GHSA-3gj5-gvvr-g6hp	x-refsource-confirm, exploit, vendor-advisory
https://github.com/Intermesh/groupoffice/commit/3fa40d7edd31fbe33babe07061d5a14ad19ea40f	x-refsource-misc, patch
https://github.com/Intermesh/groupoffice/commit/ac91b128157bc9c5ea015b6141ce71cd3bbc43f0	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.