CVE-2020-26255: Kirby Panel users could upload PHP Phar archives as content files before v2.5.14 and v3.4.5

medium Affects getkirby/cms, getkirby/panel. Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

Kirby Panel users could upload PHP Phar archives as content files before v2.5.14 and v3.4.5

Package
getkirby/cms Composer
Affected versions
>=3.0.0 and <3.4.5
Fixed in
3.4.5
Severity
medium  CVSS 6.8
Exploitation
not on CISA KEV · EPSS 1% (74.0th percentile)
Published
2020-12-08
Source
osv.dev

References

Kirby Panel users could upload PHP Phar archives as content files before v2.5.14 and v3.4.5

Package
getkirby/panel Composer
Affected versions
<2.5.14
Fixed in
2.5.14
Severity
medium  CVSS 6.8
Exploitation
not on CISA KEV · EPSS 1% (74.0th percentile)
Published
2020-12-08
Source
osv.dev

References

CWE-434
NVD recordgetkirby/cms advisoriesgetkirby/panel advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

# or, without Composer
pipx install phpwarden   &&   phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs   How findings are ranked

Related advisories