Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in Kirby - CVE-2021-32735

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Main Vulnerability Database Vulnerabilities #VU126892

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in Kirby - CVE-2021-32735

Published: July 2, 2021 / Updated: April 23, 2026


Vulnerability identifier: #VU126892
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-32735
CWE-ID: CWE-80
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Kirby
Software vendor:
Ian Stewart

Description

The vulnerability allows a remote user to execute arbitrary JavaScript code in another user's Panel session.

The vulnerability exists due to cross-site scripting in the Panel ListItem component and related Panel content rendering when displaying field and configuration text. A remote user can inject crafted HTML or script content to execute arbitrary JavaScript code in another user's Panel session.

Exploitation can lead to requests being triggered to Kirby's API with the permissions of the victim.


Remediation

Install security update from vendor's website.

External links