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CI4MS: Stored Cross‑Site Scripting (Stored XSS) in Backend User Management Allows Session Hijacking and Full Administrative Account Compromise

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-34571
Confirmed fixed CVEs
Not specified
Updated in this feed
2 Nov 2026, 21:06 UTC · Revision 1

Source evidence

CI4MS: Stored Cross‑Site Scripting (Stored XSS) in Backend User Management Allows Session Hijacking and Full Administrative Account Compromise

core-osv · Original source

Published 1 Apr 2026, 21:32 UTC

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.

osv:CVE-2026-34571
Complete source record
{
  "id": "f40e93c70698e32ef045792b3f99d89458e2d771f66619b230bfb85ba6260eb6",
  "url": "https://osv.dev/vulnerability/CVE-2026-34571",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CI4MS: Stored Cross‑Site Scripting (Stored XSS) in Backend User Management Allows Session Hijacking and Full Administrative Account Compromise",
    "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, 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.",
    "evidence": "osv:CVE-2026-34571",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-34571",
      "aliases": [
        "CVE-2026-34571",
        "GHSA-fc4p-p49v-r948"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ci4-cms-erp/ci4ms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "954622ef3d8527cde0b66b8460c26cb5cd0bab15"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.31.0.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "954622ef3d8527cde0b66b8460c26cb5cd0bab15"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "0.31.0.0"
                  },
                  {
                    "cpe": "cpe:2.3:a:ci4-cms-erp:ci4ms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.31.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.28.6.0",
            "0.28.5.0",
            "0.28.4.0",
            "0.28.3.0",
            "0.28.0.0",
            "0.27.0.0",
            "0.26.3.4",
            "0.26.3.3",
            "0.26.3.2",
            "0.26.3.1",
            "0.26.3.0",
            "0.26.2.0",
            "0.26.1.0",
            "0.26.0.0",
            "0.25.3.0",
            "0.25.2.0",
            "0.25.1.0",
            "0.25.0.43",
            "0.25.0.39",
            "0.25.0.30",
            "0.25.0.2",
            "0.25.0.1",
            "0.25.0.0",
            "0.24.0.60",
            "0.24.0.45",
            "0.24.0.42",
            "0.24.0.27",
            "0.24.0.20",
            "0.24.0.19",
            "0.24.0.18",
            "0.24.0.16",
            "0.24.0.0",
            "0.23.1.0",
            "0.23.0.0",
            "0.21.3.7",
            "0.21.3.6",
            "0.21.3.5",
            "0.21.3.4",
            "0.21.3.3",
            "0.21.3.2",
            "0.21.3.1",
            "0.21.3",
            "0.21.2",
            "0.21.1",
            "0.21.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34571.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.486746901Z",
      "provider": "osv",
      "references": [
        "https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34571.json",
        "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fc4p-p49v-r948",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-34571"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34571.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-34571",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490073,
  "published_at": "2026-04-01T21:32:16.629+00:00"
}