Stored Cross-Site Scripting Vulnerability in CI4MS by CodeIgniter 4
CVE-2026-34567

9.1CRITICAL

Key Information:

Vendor

Ci4-cms-erp

Status
Ci4ms
Vendor
CVE Published:
1 April 2026

What is CVE-2026-34567?

CI4MS, a modular CMS based on CodeIgniter 4, has a vulnerability that allows attackers to inject malicious JavaScript payloads via the Categories section during blog post creation or editing. When sanitization processes are bypassed, these payloads are stored on the server and improperly rendered later. This leads to stored XSS, potentially compromising user data and weakening site integrity. Users are advised to update to version 0.31.0.0 or later, where this vulnerability has been addressed.

Affected Version(s)

ci4ms < 0.31.0.0

References

https://github.com/ci4-cms-erp/ci4ms/security/advisories/...
x_refsource_CONFIRM
https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0
x_refsource_MISC

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

.