Current Description

kirby is a content management system (CMS) that adapts to many different projects and helps you build your own ideal interface. Cross-site scripting (XSS) is a type of vulnerability that allows execution of any kind of JavaScript code inside the Panel session of the same or other users. In the Panel, a harmful script can for example trigger requests to Kirby's API with the permissions of the victim. If bad actors gain access to your group of authenticated Panel users they can escalate their privileges via the Panel session of an admin user. Depending on your site, other JavaScript-powered attacks are possible. The multiselect field allows selection of tags from an autocompleted list. Unfortunately, the Panel in Kirby 3.5 used HTML rendering for the raw option value. This allowed **attackers with influence on the options source** to store HTML code. The browser of the victim who visited a page with manipulated multiselect options in the Panel will then have rendered this malicious HTML code when the victim opened the autocomplete dropdown. Users are *not* affected by this vulnerability if you don't use the multiselect field or don't use it with options that can be manipulated by attackers. The problem has been patched in Kirby 3.5.8.1.

View Analysis Description

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  5.4 MEDIUM

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

CNA:  GitHub, Inc.

Base Score:  5.9 MEDIUM

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

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score: N/A

NVD score not yet provided.

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://github.com/getkirby/kirby/commit/b5b8863885e17556abc070dde1e20aec15fbfdf5	Patch  Third Party Advisory
https://github.com/getkirby/kirby/releases/tag/3.5.8.1	Release Notes  Third Party Advisory
https://github.com/getkirby/kirby/security/advisories/GHSA-3f89-869f-5w76	Patch  Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	GitHub, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Initial Analysis 9/07/2022 4:37:38 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:* versions up to (excluding) 3.5.8.1
Added	CVSS V3.1		NIST AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Changed	Reference Type	https://github.com/getkirby/kirby/commit/b5b8863885e17556abc070dde1e20aec15fbfdf5 No Types Assigned	https://github.com/getkirby/kirby/commit/b5b8863885e17556abc070dde1e20aec15fbfdf5 Patch, Third Party Advisory
Changed	Reference Type	https://github.com/getkirby/kirby/releases/tag/3.5.8.1 No Types Assigned	https://github.com/getkirby/kirby/releases/tag/3.5.8.1 Release Notes, Third Party Advisory
Changed	Reference Type	https://github.com/getkirby/kirby/security/advisories/GHSA-3f89-869f-5w76 No Types Assigned	https://github.com/getkirby/kirby/security/advisories/GHSA-3f89-869f-5w76 Patch, Third Party Advisory