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Fencer Vulns
high 8.8

CVE-2026-34572 json

CI4MS: Account Deactivation Module Full Persistent Unauthorized Access for All‑Roles via Improper Session Invalidation (Logic Flaw)

published 2026-04-01 7 mo ago modified 2026-10-26 13 d ago also EUVD-2026-18089 , GHSA-8fq3-c5w3-pj3q

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

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, the application fails to immediately revoke active user sessions when an account is deactivated. Due to a logic flaw in the backend design, account state changes are enforced only during authentication (login), not for already-established sessions. The system implicitly assumes that authenticated users remain trusted for the lifetime of their session. There is no session expiration or account expiration mechanism in place, causing deactivated accounts to retain indefinite access until the user manually logs out. This behavior breaks the intended access control policy and results in persistent unauthorized access, representing a critical security flaw. This issue has been patched in version 0.31.0.0.

Patch / fix

  • packagist ci4-cms-erp/ci4ms 0.31.0.0
  • ci4-cms-erp ci4ms 0.31.0.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
7 mo ago

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-8fq3-c5w3-pj3q referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist ci4-cms-erp/ci4ms
<0.31.0.0
0.31.0.0

Affected products

  • ci4-cms-erp ci4ms

Classification

Weakness
  • CWE-284 Improper Access Control
  • CWE-613 DEPRECATED: Insufficient Session Expiration
  • CWE-1254 Incorrect Comparison Logic Granularity

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.