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Servers and applications

CVE-2020-26255

Remote code execution (RCE) from PHP Phar archives uploaded by Panel users as content files

Severity
Critical 9.1
Published
2 Dec 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.4.5
Also known as
GHSA-g3h8-cg9x-47qw
Sources
NVD, Project advisories (GitHub)

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…

Affected software

SoftwareAffected versions
KirbyServers and applications · cpe:a:getkirby:kirby
  • Every version before 3.4.5
KirbyServers and applications · github:getkirby/kirby
  • From 3.0.0 before 3.4.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-26255
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-26255
  • GitHub Advisory Database https://github.com/advisories/GHSA-g3h8-cg9x-47qw
  • github.com https://github.com/getkirby/kirby/security/advisories/GHSA-g3h8-cg9x-47qw