CVE-2026-29052

HumHub Calendar Module: Stored XSS in Event Types

CVSS 6.9 MEDIUMEPSS 0.2%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.9EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

05 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

humhub · calendar

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://github.com/humhub/calendar/releases/tag/v1.8.11 https://github.com/humhub/calendar/security/advisories/GHSA-gqj3-pmp2-mrx8