🚨 CVE-2026-87929
MaxSite CMS through 109.6 ships with a hardcoded session encryption key in application/config/config.php that is never changed during installation, allowing unauthenticated attackers to forge administrator session cookies. Attackers can mint a malicious ci_session cookie with administrator privileges by computing an HMAC-SHA1 using the publicly known encryption key, bypassing authentication checks in is_login() and mso_check_allow() functions.
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GitHub
maxsite-cve4/2026.09.08-maxsite-cms-hardcoded-session-key-auth-bypass.md at main · EviL0rd/maxsite-cve4
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September 9, 2026 17
