CVE-2026-18856: Rhymix CMS 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5, 2.1.6, 2.1.7, 2.1.8, 2.1.9, 2.1.10, 2.1.11, 2.1.12, 2.1.13…

Affected technology

Rhymix CMS · 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5, 2.1.6, 2.1.7, 2.1.8, 2.1.9, 2.1.10, 2.1.11, 2.1.12, 2.1.13, 2.1.14, 2.1.15, 2.1.16, 2.1.17, 2.1.18, 2.1.19, 2.1.20, 2.1.21, 2.1.22, 2.1.23, 2.1.24, 2.1.25, 2.1.26, 2.1.27, 2.1.28, 2.1.29, 2.1.30, 2.1.31, 2.1.32, 2.1.33
Poesis

Description’s affected range: up to 2.1.33

Component: Data Import Module
Function: procImporterAdminCheckXmlFile
File: modules/importer/importer.admin.controller.php

Attack conditions (VulDB, CVSS 4.0): Network (remote) · High privileges required · No user interaction required

What an attacker can do

VulDB’s CVSS 4.0 assessment (base score 2.0/10) rates confidentiality, integrity and availability impact as low. The description does not specify what an attacker can achieve beyond these rated impacts.