PT-2026-89110 · Maxsite · Maxsite Cms

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CVE-2026-87930

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Published

2026-09-09

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Updated

2026-09-09

CVSS v3.1

8.1

High

VectorAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
MaxSite CMS through 109.6 passes the ci session cookie to unserialize() without class restrictions, allowing unauthenticated attackers to inject PHP objects. Attackers can forge valid session cookies using the hardcoded encryption key to trigger magic methods and corrupt application state or achieve code execution if gadget classes exist.

Exploit

Fix

Deserialization of Untrusted Data

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Weakness Enumeration

Related Identifiers

CVE-2026-87930

Affected Products

Maxsite Cms