CVE-2026-87927highCWE-98

CVE-2026-87927: high-severity vulnerability in MaxSite CMS

MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.8epss 0.6%
MaxSite CMS through 109.6 contains a local file inclusion vulnerability in the ajax and require-maxsite dispatchers that allows unauthenticated attackers to execute privileged handler files by supplying base64-encoded path traversal sequences. Attackers can bypass path validation checks and execute admin-gated handler actions without authentication to access sensitive functionality.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
MaxSite · MaxSite CMS
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — MaxSite CMS

In the same product, most dangerous first.

CVE-2026-70553CRITICALMaxSite CMS Unauthenticated RCE via Install EndpointEPSS 1.3%CVE-2026-70554CRITICALMaxSite CMS Unauthenticated PHP Object Injection via maxsite_comuser CookieEPSS 1.2%CVE-2026-70552CRITICALMaxSite CMS 109.5 Unauthenticated AJAX Dispatcher Bypass via ajax.phpEPSS 0.8%CVE-2026-87930CRITICALMaxSite CMS through 109.6 PHP Object Injection via ci_sessionEPSS 0.6%CVE-2026-87929CRITICALMaxSite CMS through 109.6 Authentication Bypass via Hardcoded Encryption KeyEPSS 0.5%CVE-2026-87928MEDIUMMaxSite CMS 0.94 through 109.6 HTML Upload XSS via admin_pageEPSS 0.3%