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CVE-2020-26255

6.8 · MEDIUM

Kirby is a CMS.

Published Dec 8, 2020CWE-434EPSS 1.49%

Overview

CVE-2020-26255 is a medium-severity vulnerability. It was published on December 8, 2020 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/getkirby-v2/panel/commit/5a569d4e3ddaea2b6628d7ec1472a3e8bc410881GitHubgithub.com/getkirby/kirby/commit/db8f371b13036861c9cc5ba3e85e27f73fce5e09GitHubgithub.com/getkirby/kirby/releases/tag/3.4.5GitHubgithub.com/getkirby/kirby/security/advisories/GHSA-g3h8-cg9x-47qwRefpackagist.org/packages/getkirby/cmsRefpackagist.org/packages/getkirby/panelGitHubgithub.com/getkirby-v2/panel/commit/5a569d4e3ddaea2b6628d7ec1472a3e8bc410881GitHubgithub.com/getkirby/kirby/commit/db8f371b13036861c9cc5ba3e85e27f73fce5e09GitHubgithub.com/getkirby/kirby/releases/tag/3.4.5GitHubgithub.com/getkirby/kirby/security/advisories/GHSA-g3h8-cg9x-47qw

How CyberStrike helps

Frequently asked questions

What is CVE-2020-26255?

CVE-2020-26255 is a medium-severity vulnerability. It was published on December 8, 2020 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2020-26255?

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-26255?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-26255?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-26255 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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