CVE-2020-26255 – getkirby/cms

Package

Manager: composer
Name: getkirby/cms
Vulnerable Version: >=3.0.0 <3.4.5

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

EPSS: 0.01108 pctl0.77296

Details

Kirby Panel users could upload PHP Phar archives as content files before v2.5.14 and v3.4.5 ### Impact 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. ### Patches The problem has been patched in [Kirby 2.5.14](https://github.com/getkirby-v2/panel/releases/tag/2.5.14) and [Kirby 3.4.5](https://github.com/getkirby/kirby/releases/tag/3.4.5). Please update to one of these or a [later version](https://github.com/getkirby/kirby/releases/) 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. ### Workarounds Kirby 2 sites on older releases can also be patched by applying the [changes from this commit](https://github.com/getkirby-v2/panel/commit/5a569d4e3ddaea2b6628d7ec1472a3e8bc410881). ### Credits Thanks to Thore Imhof of Accenture for reporting the problem.

Metadata

Created: 2020-12-08T14:42:08Z
Modified: 2022-07-20T16:59:44Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/12/GHSA-g3h8-cg9x-47qw/GHSA-g3h8-cg9x-47qw.json
CWE IDs: ["CWE-434"]
Alternative ID: GHSA-g3h8-cg9x-47qw
Finding: F027
Auto approve: 1