Secuno
ENNL
Book demo

CVE-2026-39394

Ci4-cms-erp Ci4ms vulnerability

8.1 HIGHPublic exploitEPSS 0.51%
  1. Published8 Apr 2026

Description

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the Install::index() controller reads the host POST parameter without any validation and passes it directly into updateEnvSettings(), which writes it into the .env file via preg_replace(). Because newline characters in the value are not stripped, an attacker can inject arbitrary configuration directives into the .env file. The install routes have CSRF protection explicitly disabled, and the InstallFilter can be bypassed when cache('settings') is empty (cache expiry or fresh deployment). This vulnerability is fixed in 0.31.4.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Ci4-cms-erp Ci4ms< 0.31.4.0

Remediation

Fixed in
Ci4-cms-erp Ci4ms≥ 0.31.4.0

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-829739.4
Improper neutralization of CRLF sequences in IMAP command construction in…
CVE-2026-1007179.9
froxlor is a server administration panel. In versions 2.3.10 and earlier,…
CVE-2026-551598.8
luci-app-adblock-fast a WebUI for fast, lightweight DNS-based ad-blocker for OpenWrt…
CVE-2026-405308.0
An improper neutralization of CRLF sequences ('CRLF injection') vulnerability in User…
CVE-2026-909379.9
froxlor versions before 2.2.5 fail to validate newline characters in subdomain redirect…
CVE-2026-480198.9
Laravel is a web application framework. Prior to versions 12.60.0 and 13.10.0, a CRLF…

Frequently asked

Is CVE-2026-39394 being actively exploited?

CVE-2026-39394 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.51%.

How severe is CVE-2026-39394?

CVE-2026-39394 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.51% probability of exploitation.

Which products are affected by CVE-2026-39394?

Affected products include Ci4-cms-erp Ci4ms.

How do I fix CVE-2026-39394?

Upgrade affected software to a fixed version, for example Ci4-cms-erp Ci4ms 0.31.4.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-39394 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.