Vulnerability · Published Jan 21, 2026 · Assigned by GitHub_M

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

Medium 5.1

In plain English

A medium-severity cross-site scripting in groupoffice from Intermesh. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 4.0)5.1Medium

Exploit odds (30 days)0.3%top 80.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Intermesh	groupoffice	< 6.8.149>= 25.0.1, < 25.0.80

Weakness: CWE-79, CWE-20 · Vector: 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

References

https://github.com/Intermesh/groupoffice/security/advisories/GHSA-3gj5-gvvr-g6hp x_refsource_CONFIRM
https://github.com/Intermesh/groupoffice/commit/3fa40d7edd31fbe33babe07061d5a14ad19ea40f x_refsource_MISC
https://github.com/Intermesh/groupoffice/commit/ac91b128157bc9c5ea015b6141ce71cd3bbc43f0 x_refsource_MISC