CVE-2026-70552
CriticalCVSS 9.8Summary
MaxSite CMS 109.5 and earlier contain an authentication bypass vulnerability in the AJAX dispatcher that allows unauthenticated attackers to access admin-gated endpoints by supplying any X-Requested-With header and requesting a base64-encoded path to any *-ajax.php file. This can enable manipulation of poll states and vote counts.
Risk Assessment
Risk of unauthorized access to administrative functions, data manipulation, and amplification of other vulnerabilities.
Recommendation
Upgrade MaxSite CMS to the latest version. If not available, restrict access to AJAX files and monitor requests with unusual headers.
Original NVD description (English source)
MaxSite CMS 109.5 and earlier contains an authentication bypass vulnerability in the AJAX dispatcher that allows unauthenticated attackers to access admin-gated endpoints by supplying any X-Requested-With header and requesting a base64-encoded path resolving to any *-ajax.php file in the codebase. Attackers can exploit this dispatcher bypass to reach privileged plugin endpoints without credentials, enabling actions such as manipulating poll states and vote counts, and amplifying the impact of any dangerous operation performed by admin-only ajax files across the plugin tree.