CVE-2026-23887

Group-Office has stored XSS vulnerability via unsanitized filenames

MEDIUM
5.4
CVSS Score
Published: January 21, 2026 at 11:39 PM UTC
Updated: June 17, 2026 at 10:22 AM UTC
2 products affected across 2 vendorsGroup OfficeGroup-Office

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 6.8.14925.0.1 ≤ v < 25.0.80
v < 25.0.80v < 6.8.149
Affected range stops below 25.0.80, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.8.149, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79CWE-20

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