Which versions of Group Office are affected by CVE-2025-25191?

Organizations using the Name field is not properly sanitized should be aware of notable risk from CVE-2025-25191, a cross-site scripting vulnerability rated CVSS 6.9.. A patch is available.

Is there a public PoC exploit available for CVE-2025-25191?

Yes, a public proof-of-concept exploit is available for CVE-2025-25191. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-25191?

Within 30 days: Identify affected systems running the Name field is not properly sanitized and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Group Office CVE-2025-25191

Q: What is the CVSS score of CVE-2025-25191?

CVE-2025-25191 has a CVSS 4.0 base score of 6.9 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.2%.

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-03-06 security-advisories@github.com

XSS Microsoft Group Office

6.9

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.9 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:30 vuln.today

Patch released

Mar 28, 2026 - 18:30 nvd

Patch available

PoC Detected

Oct 10, 2025 - 20:11 vuln.today

Public exploit code

CVE Published

Mar 06, 2025 - 19:15 nvd

MEDIUM 6.9

DescriptionGitHub Advisory

Group-Office is an enterprise CRM and groupware tool. This Stored XSS vulnerability exists where user input in the Name field is not properly sanitized before being stored. This vulnerability is fixed in 6.8.100.

AnalysisAI

Group-Office is an enterprise CRM and groupware tool. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Group-Office is an enterprise CRM and groupware tool. This Stored XSS vulnerability exists where user input in the Name field is not properly sanitized before being stored. This vulnerability is fixed in 6.8.100. Affected products include: Group-Office Group Office.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.