CVE-2026-39393 | ci4-cms-erp ci4ms 0.28.5.0/0.31.0.0/0.31.2.0 missing authentication (GHSA-8rh5-4mvx-xj7j)

VDB-356257 · CVE-2026-39393 · GHSA-8RH5-4MVX-XJ7J CI4-CMS-ERP CI4MS 0.28.5.0/0.31.0.0/0.31.2.0 MISSING AUTHENTICATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.7 $0-$5k 1.00+ Summaryinfo A vulnerability classified as critical has been found in ci4-cms-erp ci4ms. Affected by this vulnerability is an unknown functionality. This manipulation causes missing authentication. This vulnerability is tracked as CVE-2026-39393. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component. Detailsinfo A vulnerability classified as critical was found in ci4-cms-erp ci4ms. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is: 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 route guard in ci4ms relies solely on a volatile cache check (cache('settings')) combined with .env file existence to block post-installation access to the setup wizard. When the database is temporarily unreachable during a cache miss (TTL expiry or admin-triggered cache clear), the guard fails open, allowing an unauthenticated attacker to overwrite the .env file with attacker-controlled database credentials, achieving full application takeover. This vulnerability is fixed in 0.31.4.0. The advisory is shared at github.com. This vulnerability is known as CVE-2026-39393 since 04/07/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. Upgrading to version 0.31.4.0 eliminates this vulnerability. Productinfo Type Content Management System Vendor ci4-cms-erp Name ci4ms Version 0.28.5.0 0.31.0.0 0.31.2.0 Website Product: https://github.com/ci4-cms-erp/ci4ms/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.8 VulDB Meta Temp Score: 6.7 VulDB Base Score: 5.6 VulDB Temp Score: 5.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.1 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Missing authentication CWE: CWE-306 / CWE-287 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: ci4ms 0.31.4.0 Timelineinfo 04/07/2026 CVE reserved 04/08/2026 +1 days Advisory disclosed 04/08/2026 +0 days VulDB entry created 04/08/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-8rh5-4mvx-xj7j Status: Confirmed CVE: CVE-2026-39393 (🔒) GCVE (CVE): GCVE-0-2026-39393 GCVE (VulDB): GCVE-100-356257 Entryinfo Created: 04/08/2026 17:23 Changes: 04/08/2026 17:23 (65) Complete: 🔍 Cache ID: 99:BC1:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸