What is the CVSS score of CVE-2026-30238?

CVE-2026-30238 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Group Office are affected by CVE-2026-30238?

Organizations using Group-Office should be aware of moderate risk from CVE-2026-30238, a cross-site scripting vulnerability rated CVSS 6.1.

Is there a public PoC exploit available for CVE-2026-30238?

Yes, a public proof-of-concept exploit is available for CVE-2026-30238. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-30238?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Group Office CVE-2026-30238

MEDIUM

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

2026-03-06 security-advisories@github.com

XSS Group Office

6.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

PoC Detected

Mar 11, 2026 - 13:32 vuln.today

Public exploit code

CVE Published

Mar 06, 2026 - 22:16 nvd

MEDIUM 6.1

DescriptionGitHub Advisory

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.155, 25.0.88, and 26.0.10, there is a reflected XSS vulnerability in GroupOffice on the external/index flow. The f parameter (Base64 JSON) is decoded and then injected into an inline JavaScript block without strict escaping, allowing </script><script>...</script> injection and arbitrary JavaScript execution in the victim's browser. This issue has been patched in versions 6.8.155, 25.0.88, and 26.0.10.

AnalysisAI

Reflected cross-site scripting in GroupOffice versions before 6.8.155, 25.0.88, and 26.0.10 allows unauthenticated attackers to execute arbitrary JavaScript in a victim's browser by injecting malicious code through the Base64-encoded f parameter. The vulnerability exists in the external/index flow where user input is decoded and inserted into inline JavaScript without proper sanitization. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 6.1 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-30238 vulnerability details – vuln.today

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