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SCA: security update for getkirby/cms (GHSA-x5mr-p6v4-wp93)

high Tenable Cloud Security Plugin ID 420313

Description

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

 - Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2,
 3.8.4.1, and 3.9.6 affects all Kirby sites that might have potential attackers in the group of
 authenticated Panel users or that allow external visitors to update a Kirby content file (e.g. via a
 contact or comment form). Kirby sites are *not* affected if they don't allow write access for untrusted
 users or visitors. A field injection in a content storage implementation is a type of vulnerability that
 allows attackers with content write access to overwrite content fields that the site developer didn't
 intend to be modified. In a Kirby site this can be used to alter site content, break site behavior or
 inject malicious data or code. The exact security risk depends on the field type and usage. Kirby stores
 content of the site, of pages, files and users in text files by default. The text files use Kirby's
 KirbyData format where each field is separated by newlines and a line with four dashes (`----`). When
 reading a KirbyData file, the affected code first removed the Unicode BOM sequence from the file contents
 and afterwards split the content into fields by the field separator. When writing to a KirbyData file,
 field separators in field data are escaped to prevent user input from interfering with the field
 structure. However this escaping could be tricked by including a Unicode BOM sequence in a field separator
 (e.g. `--\xEF\xBB\xBF--`). When writing, this was not detected as a separator, but because the BOM was
 removed during reading, it could be abused by attackers to inject other field data into content files.
 Because each field can only be defined once per content file, this vulnerability only affects fields in
 the content file that were defined above the vulnerable user-writable field or not at all. Fields that are
 defined below the vulnerable field override the injected field content and were therefore already
 protected. The problem has been patched in Kirby 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6. In all of
 the mentioned releases, the maintainers have fixed the affected code to only remove the Unicode BOM
 sequence at the beginning of the file. This fixes this vulnerability both for newly written as well as for
 existing content files. (CVE-2023-38488)

See Also

https://github.com/advisories/GHSA-x5mr-p6v4-wp93

Plugin Details

Severity: High

ID: 420313

Version: Revision 1.6

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: Medium

Score: 4.9

Percentile: 57.58

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2023-38488

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/28/2023

Vulnerability Publication Date: 7/27/2023

Reference Information

CVE: CVE-2023-38488