The Calendar module for HumHub enables users to create one-time or recurring events, manage attendee invitations, and efficiently track all scheduled activities. Prior to version 1.8.11, a Stored Cross-Site Scripting (XSS) vulnerability in the Event Types of the HumHub Calendar module impacts users viewing events created by an administrative account. This issue has been patched in version 1.8.11.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Humhub
  • Calendar

Configuration 1 [-]

cpe:2.3:a:humhub:calendar:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://www.spirityenterprise.com/pentest spirity
https://github.com/humhub/calendar/releases/tag/v1.8.11 cve-icon cve-icon
https://github.com/humhub/calendar/security/advisories/GHSA-gqj3-pmp2-mrx8 cve-icon cve-icon
History

Mon, 09 Mar 2026 18:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:humhub:calendar:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

Fri, 06 Mar 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Humhub
Humhub calendar
Vendors & Products Humhub
Humhub calendar

Thu, 05 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 05 Mar 2026 06:00:00 +0000

Type Values Removed Values Added
Description The Calendar module for HumHub enables users to create one-time or recurring events, manage attendee invitations, and efficiently track all scheduled activities. Prior to version 1.8.11, a Stored Cross-Site Scripting (XSS) vulnerability in the Event Types of the HumHub Calendar module impacts users viewing events created by an administrative account. This issue has been patched in version 1.8.11.
Title HumHub Calendar Module: Stored XSS in Event Types
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 6.9, '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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-05T15:30:11.121Z

Reserved: 2026-03-03T17:50:11.244Z

Link: CVE-2026-29052

cve-icon Vulnrichment

Updated: 2026-03-05T15:30:07.662Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-05T06:16:50.260

Modified: 2026-03-09T18:40:51.523

Link: CVE-2026-29052

cve-icon Redhat

No data.