What is the CVSS score of CVE-2026-29048?

CVE-2026-29048 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 Humhub are affected by CVE-2026-29048?

Organizations using the Button component of should be aware of moderate risk from CVE-2026-29048, a cross-site scripting vulnerability rated CVSS 6.1.. A patch is available.

How to fix or mitigate CVE-2026-29048?

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

Humhub CVE-2026-29048

MEDIUM

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

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

XSS Humhub

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

Patch released

Mar 09, 2026 - 21:23 nvd

Patch available

CVE Published

Mar 06, 2026 - 07:16 nvd

MEDIUM 6.1

DescriptionGitHub Advisory

HumHub is an Open Source Enterprise Social Network. In version 1.18.0, a cross-site scripting vulnerability was identified in the Button component of version 1.18.0. Due to inconsistent output encoding at several points within the software, malicious scripts could be injected and executed in the context of the user's browser. This issue has been patched in version 1.18.1.

AnalysisAI

Cross-site scripting in HumHub 1.18.0's Button component allows unauthenticated attackers to inject and execute malicious scripts in users' browsers through inconsistent output encoding. Affected users could have their sessions compromised or be redirected to malicious content without any user interaction beyond visiting a crafted page. A patch is available in version 1.18.1.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the Button component of Humhub. HumHub is an Open Source Enterprise Social Network. In version 1.18.0, a cross-site scripting vulnerability was identified in the Button component of version 1.18.0. Due to inconsistent output encoding at several points within the software, malicious scripts could be injected and executed in the context of the user's browser. This issue has been patched in version 1.18.1.

RemediationAI

A vendor patch is available — apply it immediately. Fixed in version 1.18.1.. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.