CVE-2026-23887CWE-20CWE-79

Group-Office has stored XSS vulnerability via unsanitized filenames

Medium · published January 21, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
18.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
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
EPSS
0.00274 · 18.8th percentile
Weaknesses
CWE-20 · Improper Input Validation; CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-01-21T23:39Z
EPSS history
Timeline
  • 21 JAN 23:39Z
    Group-Office has stored XSS vulnerability via unsanitized filenames
    cvelistv5