CVE-2026-34564: CI4MS: Menu Management (Pages) Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS

CVE-2026-34564 · Severity: critical · CVSS 9.1 · Published 2026-04-01

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input when adding Pages to navigation menus through the Menu Management functionality. Page-related data selected via the Pages section is stored server-side and rendered without proper output encoding. This stored payload is later rendered unsafely within administrative interfaces and public-facing navigation menus, leading to stored DOM-based cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.

Technologies: Ci4-Cms-Erp Ci4ms, ci4-cms-erp/ci4ms (Packagist). Vendors: Ci4-Cms-Erp, Packagist.

Quick answers

Is CVE-2026-34564 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-34564 being exploited in the wild.
How severe is CVE-2026-34564?
Critical severity, with a CVSS score of 9.1, published 1 April 2026.
Which products and versions are affected?
ci4-cms-erp/ci4ms (Packagist) ECOSYSTEM:introduced=0,fixed=0.31.0.0.
Is there a fix for CVE-2026-34564?
Yes. ci4-cms-erp/ci4ms (Packagist): upgrade to 0.31.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-34564?
Check whether you run Ci4-Cms-Erp Ci4ms or ci4-cms-erp/ci4ms (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • ci4-cms-erp/ci4ms (Packagist): upgrade to 0.31.0.0 or later
    composer require ci4-cms-erp/ci4ms:^0.31.0.0

Affected products

  • Ci4-Cms-Erp Ci4ms
  • ci4-cms-erp/ci4ms (Packagist) ECOSYSTEM:introduced=0,fixed=0.31.0.0

Identifiers

  • CVE-2026-34564
  • GHSA-g4pp-fhgf-8653

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