# CVE-2026-34571: CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC…

Source: https://junglewise.ai/threats/cve-2026-34571-ci4ms-stored-cross-site-scripting-stored-xss-in-backend-user  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-01  
License: CC BY 4.0 with a link back

CVE-2026-34571 · Severity: critical · CVSS 9.9 · 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, a Stored Cross-Site Scripting (Stored XSS) vulnerability exists in the backend user management functionality. The application fails to properly sanitize user-controlled input before rendering it in the administrative interface, allowing attackers to inject persistent JavaScript code. This results in automatic execution whenever backend users access the affected page, enabling session hijacking, privilege escalation, and full administrative account compromise. This issue has been patched in version 0.31.0.0.

Technologies: [Ci4-Cms-Erp Ci4ms](https://junglewise.ai/threats/technologies/ci4-cms-erp-ci4ms-1), [ci4-cms-erp/ci4ms (Packagist)](https://junglewise.ai/threats/technologies/ci4-cms-erp-ci4ms). Vendors: [Ci4-Cms-Erp](https://junglewise.ai/threats/vendors/ci4-cms-erp), [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2026-34571 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34571 being exploited in the wild.

**How severe is CVE-2026-34571?** Critical severity, with a CVSS score of 9.9, 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-2026-34571?** 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-2026-34571?** 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

  ```sh
  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-2026-34571
- GHSA-fc4p-p49v-r948

## Related threats

- [ci4-cms-erp CI4MS stored XSS in Pages module](https://junglewise.ai/threats/cve-2026-45270-ci4-cms-erp-ci4ms-stored-xss-in-pages-module)
- [ci4-cms-erp CI4MS file deletion and rename in Fileeditor module](https://junglewise.ai/threats/cve-2026-45139-ci4-cms-erp-ci4ms-file-deletion-and-rename-in-fileeditor-module)
- [ci4-cms-erp ci4ms stored XSS in Blog and Pages content](https://junglewise.ai/threats/cve-2026-45138-ci4-cms-erp-ci4ms-stored-xss-in-blog-and-pages-content)
- [CI4MS has a Deactivated User Session Bypass (active=0)](https://junglewise.ai/threats/cve-2026-41891-ci4ms-has-a-deactivated-user-session-bypass-active-0)
- [CI4MS Vulnerable to Arbitrary Database Table Drop via Theme deleteProcess](https://junglewise.ai/threats/cve-2026-41890-ci4ms-vulnerable-to-arbitrary-database-table-drop-via-theme)