CVE-2026-49276
Published:July 09, 2026
Updated:July 21, 2026
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites using the writer field in any blueprint allowed a scripting link to be included as the target of a link or email link in writer mark components, making the target clickable by the user who entered it and enabling self cross-site scripting in the Panel. This issue is fixed in versions 4.9.4 and 5.4.4.
Affected Packages
https://github.com/getkirby/kirby.git (GITHUB):
Affected version(s) >=5.0.0 <5.4.4Fix Suggestion:
Update to version 5.4.4https://github.com/getkirby/kirby.git (GITHUB):
Affected version(s) >=3.0.0 <4.9.4Fix Suggestion:
Update to version 4.9.4getkirby/cms (PHP):
Affected version(s) >=dev-release-3.6.1/3459-str-empty-needle <4.9.4Fix Suggestion:
Update to version 4.9.4getkirby/cms (PHP):
Affected version(s) >=dev-release-3.6.1/3459-str-empty-needle <4.9.4Fix Suggestion:
Update to version 4.9.4getkirby/cms (PHP):
Affected version(s) >=5.0.0 <5.4.4Fix Suggestion:
Update to version 5.4.4getkirby/cms (PHP):
Affected version(s) >=5.0.0-alpha.1 <5.4.4Fix Suggestion:
Update to version 5.4.4Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
ACTIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Script in Attributes in a Web Page
EPSS
Base Score:
0.29