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

Q: How do I fix CVE-2026-34571?

ci4ms: upgrade to 0.31.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-34571 being exploited?

CVE-2026-34571 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-34571 affect?

CVE-2026-34571 affects ci4ms. Severity is critical (CVSS 9.9). 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

Q: How urgent is CVE-2026-34571?

Priority 48/100. Critical severity; Public exploit reference

This month

CRITICAL 9.9UPGRADE

CVE-2026-34571 is a critical-severity flaw (CVSS 9.9) affecting ci4ms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 co

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-01
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: ci4-cms-erp

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-01 22:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

ci4-cms-erp ci4ms UPGRADE

Affected: < 0.31.0.0

Fixed in: 0.31.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ci4ms || rpm -q ci4ms || ci4ms --version

2. UPGRADE to 0.31.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ci4ms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ci4ms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-34571?

ci4ms: upgrade to 0.31.0.0. Exact commands for each OS are on this page.

Is CVE-2026-34571 being exploited?

CVE-2026-34571 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-34571 affect?

CVE-2026-34571 affects ci4ms. Severity is critical (CVSS 9.9). 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

How urgent is CVE-2026-34571?

Priority 48/100. Critical severity; Public exploit reference

Related CVEs

CVE-2026-34569 CRITICAL 9.9 UPGRADE CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC a
CVE-2026-34572 HIGH 8.8 UPGRADE CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC a
CVE-2026-34564 CRITICAL 9.1 UPGRADE CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC a
CVE-2026-34563 CRITICAL 9.1 UPGRADE CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC a
CVE-2026-34565 CRITICAL 9.1 UPGRADE CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC a

References

← Back to latest CVEs