Vulnerability · Published May 7, 2026 · Assigned by GitHub_M

CVE-2026-41891CI4MS: Deactivated User Session Bypass (active=0)

Medium 5.3

In plain English

A medium-severity security flaw in ci4ms from ci4-cms-erp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.3%top 80.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0 to before version 0.31.8.0, the auth filter has the deactivated/banned user check commented out. This issue has been patched in version 0.31.8.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	ci4-cms-erp/ci4ms	0.31.8.0	GHSA-5hfv-c864-qcq9

Affected products (as reported)

Vendor	Product	Versions
ci4-cms-erp	ci4ms	>= 0.26.0, < 0.31.8.0

Weakness: CWE-613 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

References

https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-5hfv-c864-qcq9 x_refsource_CONFIRM
https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.8.0 x_refsource_MISC