A vulnerability described as problematic has been identified in Intelliants Subrion CMS up to 4.0.3 . Affected by this issue is some unknown functionality of the component Blocks Endpoint . Such manipulation of the argument CSS class name leads to cross site scripting. This vulnerability is traded as CVE-2026-12202 . The attack may be launched remotely. Furthermore, there is an exploit available. The vendor was contacted early about this disclosure but did not respond in any way.