Detections
Analytics

SCA: security update for getkirby/cms (GHSA-cq58-r77c-5jjw)

medium Tenable Self-Hosted Container Security Plugin ID 414018

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Kirby is an open source file structured CMS. In affected versions Kirby's blocks field stores structured
 data for each block. This data is then used in block snippets to convert the blocks to HTML for use in
 your templates. We recommend to escape HTML special characters to protect against cross-site scripting
 (XSS) attacks. The default snippet for the image block unfortunately did not use our escaping helper. This
 made it possible to include malicious HTML code in the source, alt and link fields of the image block,
 which would then be displayed on the site frontend and executed in the browsers of site visitors and
 logged in users who are browsing the site. Attackers must be in your group of authenticated Panel users in
 order to exploit this weakness. Users who do not make use of the blocks field are not affected. This issue
 has been patched in Kirby version 3.5.8 by escaping special HTML characters in the output from the default
 image block snippet. Please update to this or a later version to fix the vulnerability. (CVE-2021-41258)

See Also

https://github.com/advisories/GHSA-cq58-r77c-5jjw

Plugin Details

Severity: Medium

ID: 414018

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 8.67

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: CVSS2#AV:N/AC:H/Au:S/C:N/I:P/A:N

CVSS Score Source: CVE-2021-41258

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 11/16/2021

Vulnerability Publication Date: 11/16/2021

Reference Information

CVE: CVE-2021-41258