CVE-2026-34571
CI4MS: Stored Cross‑Site Scripting (Stored XSS) in Backend User Management Allows Session Hijacking and Full Administrative Account Compromise
Description
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 code. This results in automatic execution whenever backend users access the affected page, enabling session hijacking, privilege escalation, and full administrative account compromise. This issue has been patched in version 0.31.0.0.
INFO
Published Date :
April 1, 2026, 10:16 p.m.
Last Modified :
April 6, 2026, 4:33 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | MITRE-CVE | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update CI4MS to version 0.31.0.0.
- Sanitize all user input.
- Implement output encoding.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34571.
| URL | Resource |
|---|---|
| https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0 | Release Notes |
| https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fc4p-p49v-r948 | Exploit Vendor Advisory |
| https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fc4p-p49v-r948 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34571 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34571
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34571 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34571 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 06, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:ci4-cms-erp:ci4ms:*:*:*:*:*:*:*:* versions up to (excluding) 0.31.0.0 Added Reference Type GitHub, Inc.: https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fc4p-p49v-r948 Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fc4p-p49v-r948 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 02, 2026
Action Type Old Value New Value Added Reference https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fc4p-p49v-r948 -
New CVE Received by [email protected]
Apr. 01, 2026
Action Type Old Value New Value Added Description 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 code. This results in automatic execution whenever backend users access the affected page, enabling session hijacking, privilege escalation, and full administrative account compromise. This issue has been patched in version 0.31.0.0. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-79 Added Reference https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0 Added Reference https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fc4p-p49v-r948