CVE-2024-27087 Kirby cross-site scripting (XSS) in the link field "Custom" type

2024-02-2616:44:31

CWE-79

GitHub_M

www.cve.org

kirby content management

xss vulnerability

custom link type

url validation

javascript execution

security patch

4.6 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

5.5 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.1%

JSON

Kirby is a content management system. The new link field introduced in Kirby 4 allows several different link types that each validate the entered link to the relevant URL format. It also includes a “Custom” link type for advanced use cases that don’t fit any of the pre-defined link formats. As the “Custom” link type is meant to be flexible, it also allows the javascript: URL scheme. In some use cases this can be intended, but it can also be misused by attackers to execute arbitrary JavaScript code when a user or visitor clicks on a link that is generated from the contents of the link field. This vulnerability is patched in 4.1.1.

CNA Affected

[
  {
    "vendor": "getkirby",
    "product": "kirby",
    "versions": [
      {
        "version": ">= 4.0.0, < 4.1.1",
        "status": "affected"
      }
    ]
  }
]