{"id":"CVE-2026-70552","title":"MaxSite CMS 109.5 Unauthenticated AJAX Dispatcher Bypass via ajax.php","summary":"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-e…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-306"],"vendor":"MaxSite","product":"MaxSite CMS","affected":["cms >= 0.78 <= 109.5"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-08-05T13:49:46.903584Z"},"published":"2026-08-04","updated":"2026-09-24","sourceUpdated":"2026-09-24T14:18:35.417Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-70552","references":[{"url":"https://github.com/maxsite/cms","label":"Product Repository"},{"url":"https://max-3000.com/page/maxsite-cms-109-6","label":"Patch Commit"},{"url":"https://www.vulncheck.com/advisories/maxsite-cms-unauthenticated-ajax-dispatcher-bypass-via-ajax-php"}],"tags":["cve.org"],"epss":0.00566,"epssPercentile":0.45765,"ingestedAt":"2026-09-24T15:45:56.717Z","slug":"CVE-2026-70552","body":"## Overview\n\nMaxSite 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.\n\n## Affected\n\n- `cms >= 0.78 <= 109.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}