CVE-2026-70552: MaxSite CMS 0.78 through 109.5

CVE-2026-70552. CVSS 3.1 base score 9.8 (CRITICAL, Vendor/CNA). EPSS 0.00826 (percentile 0.5699), scored 22-Oct-2026.

Affected technology

MaxSite CMS · 0.78 through 109.5
MaxSite

Description’s affected range: 109.5 and earlier

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Unauthenticated attackers can 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. Vendor/CNA’s CVSS 4.0 assessment (base score 9.3/10) rates confidentiality, integrity and availability impact as high.

Published 24-Oct-2026 01:43 UTC

CWE: CWE-306
CCR priority: 39.4 /100 (P4)
CVSS 3.1: 9.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · Vendor/CNA
EPSS: 0.00826 · percentile 0.5699 · 2026-10-22
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-24 01:40:49.068977+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-70552.html