CVE-2026-34989CRITICAL 9.0EPSS p21.2%

CVE-2026-34989CVE-2026-34989

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.

Scoring

CVSS 3.19.0 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
EPSS0.30% probability of exploitation · percentile 21.2% · 2026-06-19T12:03:05Z
Published2026-04-06
Last modified2026-04-27

Underlying weaknesses· 1

CWE-79

References

  1. https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-vr2g-rhm5-q4jr
  2. https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-vr2g-rhm5-q4jr

1

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting')cwe-790%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.