Critical · CVSS 9.9EPSS 0.57%Public exploitNo fix published
CVE-2026-9558
A Server-Side Template Injection (SSTI) vulnerability exists in Mautic's theme engine. The platform renders uploaded Twig templates without a sandbox or strict function restrictions. Authenticated users with permissions to create or upload themes can abuse this to execute arbitrary code on the hosting server (Remote Code Execution) or access restricted system files and configuration settings.
SummaryThis advisory addresses a SQL injection vulnerability in the API endpoint used for retrieving contact activities. A vulnerability exists in the query construction for the Contact Activity timeline where the parameter responsible for determining the sort direction was not strictly validated against an allowlist, potentially allowing authenticated users to inject arbitrary SQL commands via the API.
MitigationPlease update to 4.4.19, 5.2.10, 6.0.8, 7.0.1 or later.
WorkaroundsNone.
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