Arbitrary file upload in Getkirby Kirby
CVE-2020-26255
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.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.015 (73.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Getkirby Kirby — versions < 3.4.5
- Getkirby Panel
Weakness classification (CWE)
References
- packagist.org/packages/getkirby/cms (Product, Third Party Advisory)
- packagist.org/packages/getkirby/panel (Product, Third Party Advisory)
- github.com/getkirby/kirby/security/advisories/GHSA-g3h8-cg9x-47qw (Third Party Advisory, Release Notes)
- github.com/getkirby/kirby/releases/tag/3.4.5 (Third Party Advisory, Release Notes)
- github.com/getkirby/kirby/commit/db8f371b13036861c9cc5ba3e85e27f73fce5e09 (Patch, Third Party Advisory)
- github.com/getkirby-v2/panel/commit/5a569d4e3ddaea2b6628d7ec1472a3e8bc410881 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-26255?
- CVE-2020-26255 is a medium-severity vulnerability in Getkirby Kirby, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.8/10. Published 2020-12-08.
- How severe is CVE-2020-26255?
- Medium severity. CVSS v3 base score is 6.8 out of 10.