Vulnerability Report

CVE-2026-29048

Title: HumHub - Cross-Site Scripting

XSS

Proof Of Concept

No public PoC currently indexed for CVE-2026-29048.

CWE Category CWE-79

Published Date Mar 06, 2026

Modified Date Mar 09, 2026

Exploit Status Not Found

Score 6.9 CVSS v4.0

Exploit Probability (EPSS)

0.04%

Vulnerability Summary

CVE-2026-29048: 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.

Impacted Vendors

humhub 1

Reference Links

https://github.com/humhub/humhub/commit/bd06ab4c75f6c65295ee3e1ce3643437e8f9d10a https://github.com/humhub/humhub/pull/8039 https://github.com/humhub/humhub/releases/tag/v1.18.1 https://github.com/humhub/humhub/security/advisories/GHSA-qxjh-478x-23gm

CVSS v4.0

Source Entity [email protected]

Severity MEDIUM

6.9

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/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

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.1

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

REQUIRED

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

CHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns