Stored DOM-Based Cross-Site Scripting in CI4MS CMS by CodeIgniter 4
CVE-2026-34558

9.1CRITICAL

Key Information:

Vendor

Ci4-cms-erp

Status
Ci4ms
Vendor
CVE Published:
30 March 2026

What is CVE-2026-34558?

CI4MS, a modular CMS built on CodeIgniter 4, contains a vulnerability in its Methods Management functionality which improperly sanitizes user input. This oversight allows attackers to introduce and store malicious JavaScript payloads within multiple input fields. When these payloads are rendered within the administrative interfaces or global navigation components, they execute without proper output encoding, exposing the application to Stored DOM-Based Cross-Site Scripting (XSS) attacks. Users are strongly encouraged to upgrade to version 0.31.0.0 or later to mitigate this security risk.

Affected Version(s)

ci4ms < 0.31.0.0

References

https://github.com/ci4-cms-erp/ci4ms/security/advisories/...
x_refsource_CONFIRM

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.