CVE-2026-70553: MaxSite CMS 105.2 through 109.5

CVE-2026-70553. CVSS 3.1 base score 9.8 (CRITICAL, Vendor/CNA). EPSS 0.01274 (percentile 0.69683), scored 22-Oct-2026.

Affected technology

MaxSite CMS · 105.2 through 109.5
MaxSite

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 inject arbitrary PHP code into the application configuration file by submitting crafted POST requests to the install endpoint after installation is complete. 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-94
CCR priority: 39.5 /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: 0.01274 · percentile 0.69683 · 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-2026-70553.html