USN-7749-1: Cpanel-JSON-XS vulnerability

Publication date

15 September 2025

Overview

Cpanel-JSON-XS could be made to crash if it parsed specially crafted JSON.


Packages

Details

It was discovered that Cpanel-JSON-XS incorrectly handled parsing certain
JSON data. An attacker could possibly use this issue to cause
Cpanel-JSON-XS to crash, resulting in a denial of service.

It was discovered that Cpanel-JSON-XS incorrectly handled parsing certain
JSON data. An attacker could possibly use this issue to cause
Cpanel-JSON-XS to crash, resulting in a denial of service.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
25.04 plucky libcpanel-json-xs-perl –  4.39-1ubuntu0.1
24.04 noble libcpanel-json-xs-perl –  4.37-1ubuntu0.1
22.04 jammy libcpanel-json-xs-perl –  4.27-1ubuntu0.2

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