PT-2021-19895 · Kirby Cms · Kirby Cms

Hdodov · Published 2021-07-02 · Updated 2021-07-06 · CVE-2021-32735

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Name of the Vulnerable Software and Affected Versions Kirby CMS versions 3.5.5 through 3.5.6

Description Kirby is a content management system. The Panel's ListItem component displayed HTML in page titles as it is, which 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.

Recommendations For versions 3.5.5 and 3.5.6, update to Kirby 3.5.7 to patch 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.

Fix

XSS

Weakness Enumeration

CWE-79

CWE-80

Related Identifiers

CVE-2021-32735

GHSA-2F2W-349X-VRQM

Affected Products

Kirby Cms

References · 9

• https://github.com/getkirby/kirby/security/advisories/GHSA-2f2w-349x-vrqm · Patch
• https://github.com/getkirby/kirby/releases/tag/3.5.7 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-32735 · Security Note
• https://osv.dev/vulnerability/GHSA-2f2w-349x-vrqm · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-32735 · Vendor Advisory
• https://github.com/getkirby/kirby · Note
• https://github.com/getkirby/kirby/commit/f5ead62f8510158bed5baf58ca0e851875778a09 · Note
• https://t.me/cvenotify/17173 · Telegram Post
• https://t.me/cibsecurity/25897 · Telegram Post