SCA: security update for getkirby/cms, getkirby/panel (GHSA-2ccx-2gf3-8xvv)

medium Tenable Cloud Security Plugin ID 432904

Description

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

- Kirby is a CMS. In Kirby CMS (getkirby/cms) before version 3.3.6, and Kirby Panel before version 2.5.14
there is a vulnerability in which the admin panel may be accessed if hosted on a .dev domain. In order to
protect new installations on public servers that don't have an admin account for the Panel yet, we block
account registration there by default. This is a security feature, which we implemented years ago in Kirby
2. It helps to avoid that you forget registering your first admin account on a public server. In this case
– without our security block – someone else might theoretically be able to find your site, find out it's
running on Kirby, find the Panel and then register the account first. It's an unlikely situation, but it's
still a certain risk. To be able to register the first Panel account on a public server, you have to
enforce the installer via a config setting. This helps to push all users to the best practice of
registering your first Panel account on your local machine and upload it together with the rest of the
site. This installation block implementation in Kirby versions before 3.3.6 still assumed that .dev
domains are local domains, which is no longer true. In the meantime, those domains became publicly
available. This means that our installation block is no longer working as expected if you use a .dev
domain for your Kirby site. Additionally the local installation check may also fail if your site is behind
a reverse proxy. You are only affected if you use a .dev domain or your site is behind a reverse proxy and
you have not yet registered your first Panel account on the public server and someone finds your site and
tries to login at `yourdomain.dev/panel` before you register your first account. You are not affected if
you have already created one or multiple Panel accounts (no matter if on a .dev domain or behind a reverse
proxy). The problem has been patched in Kirby 3.3.6. Please upgrade to this or a later version to fix the
vulnerability. (CVE-2020-26253)

Plugin Details

Severity: Medium

ID: 432904

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 8/11/2025

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2020-26253

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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: 1/14/2021

Vulnerability Publication Date: 12/8/2020

Reference Information

CVE: CVE-2020-26253

cwe: CWE-346

Detections

Analytics