Description
Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a persistent Denial of Service (DoS) via a malformed image upload. The application fails to properly validate the return value of the PHP getimagesize() function. When the system attempts to process this file for metadata or thumbnail generation, it triggers a fatal TypeError.
Scores
CVSS v3
6.5
EPSS
0.0004
EPSS Percentile
13.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-20
CWE-252
Status
published
Products (2)
getkirby/cms
0 - 5.2.0-rc.1Packagist
getkirby/kirby
< 5.1.4
Published
Mar 26, 2026
Tracked Since
Mar 26, 2026