CVE-2020-26255
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 1.49% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- getkirby/kirby · getkirby/panel
- Source
- security-advisories@github.com
References
- https://github.com/getkirby-v2/panel/commit/5a569d4e3ddaea2b6628d7ec1472a3e8bc410881Patch, Third Party Advisory
- https://github.com/getkirby/kirby/commit/db8f371b13036861c9cc5ba3e85e27f73fce5e09Patch, Third Party Advisory
- https://github.com/getkirby/kirby/releases/tag/3.4.5Release Notes, Third Party Advisory
- https://github.com/getkirby/kirby/security/advisories/GHSA-g3h8-cg9x-47qwRelease Notes, Third Party Advisory
- https://packagist.org/packages/getkirby/cmsProduct, Third Party Advisory
- https://packagist.org/packages/getkirby/panelProduct, Third Party Advisory
- https://github.com/getkirby-v2/panel/commit/5a569d4e3ddaea2b6628d7ec1472a3e8bc410881Patch, Third Party Advisory
- https://github.com/getkirby/kirby/commit/db8f371b13036861c9cc5ba3e85e27f73fce5e09Patch, Third Party Advisory
- https://github.com/getkirby/kirby/releases/tag/3.4.5Release Notes, Third Party Advisory
- https://github.com/getkirby/kirby/security/advisories/GHSA-g3h8-cg9x-47qwRelease Notes, Third Party Advisory
- https://packagist.org/packages/getkirby/cmsProduct, Third Party Advisory
- https://packagist.org/packages/getkirby/panelProduct, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.