CVE-2020-26255 Information

Description

Kirby is a CMS. In Kirby CMS (getkirby/cms) before version 3.4.5 and Kirby Panel before version 2.5.14 an editor with full access to the Kirby Panel can upload a PHP .phar file and execute it on the server. This vulnerability is critical if you might have potential attackers in your group of authenticated Panel users as they can gain access to the server with such a Phar file. Visitors without Panel access cannot use this attack vector. The problem has been patched in Kirby 2.5.14 and Kirby 3.4.5. Please update to one of these or a later version to fix the vulnerability. Note: Kirby 2 reaches end of life on December 31 2020. We therefore recommend to upgrade your Kirby 2 sites to Kirby 3. If you cannot upgrade we still recommend to update to Kirby 2.5.14.

CVSS Vector

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

Reference

https://packagist.org/packages/getkirby/cms https://github.com/getkirby-v2/panel/commit/5a569d4e3ddaea2b6628d7ec1472a3e8bc410881 https://packagist.org/packages/getkirby/panel https://github.com/getkirby/kirby/commit/db8f371b13036861c9cc5ba3e85e27f73fce5e09 https://github.com/getkirby/kirby/releases/tag/3.4.5 https://github.com/getkirby/kirby/security/advisories/GHSA-g3h8-cg9x-47qw

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.1