CVE-2026-34989

Critical

Description

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 31.0.0.0, the application fails to properly sanitize user-controlled input when users update their profile name (e.g., full name / username). An attacker can inject a malicious JavaScript payload into their profile name, which is then stored server-side. This stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS). This vulnerability is fixed in 31.0.0.0.

SeverityCritical
CVSS9.0
Exploit probability—
ProductCi4-cms-erp Ci4ms
PublishedApr 6, 2026
First seenApr 6, 2026

How to fix

Update
  • ci4-cms-erp ci4ms0.31.0.0 or later
  • ci4-cms-erp/ci4ms31.0.0.0 or later

Affected products

ProductAffected versionsFixed in
ci4-cms-erp ci4msv < 0.31.0.00.31.0.0
ci4-cms-erp/ci4msPackagistv < 31.0.0.031.0.0.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.