CVE-2021-32735 Information

Description

Kirby is a content management system. In Kirby CMS versions 3.5.5 and 3.5.6 the Panel’s ListItem component (used in the pages and files section for example) displayed HTML in page titles as it is. This could be used for cross-site scripting (XSS) attacks. Malicious authenticated Panel users can escalate their privileges if they get access to the Panel session of an admin user. Visitors without Panel access can use the attack vector if the site allows changing site data from a frontend form. Kirby 3.5.7 patches the vulnerability. As a partial workaround site administrators can protect against attacks from visitors without Panel access by validating or sanitizing provided data from the frontend form.

CVSS Vector

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

Reference

https://github.com/getkirby/kirby/security/advisories/GHSA-2f2w-349x-vrqm https://github.com/getkirby/kirby/releases/tag/3.5.7

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4