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CVE-2026-87930

MaxSite CMS through 109.6 PHP Object Injection via ci_session

CVSS 4.0 9.2 CRITICALCVSS 3.1 8.1 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-87930

Published

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.

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Affected versions, risk and source history

Related advisories and sources

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-87930 · CVE overview and exploitation status

cve-program · CVE-2026-87930

Related changes

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 12 Nov 13:19 UTC · 273 of 275 readable · 271 fully read · documentation 469/469 current

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