CVE-2026-39390

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 Google Maps iframe setting (cMap field) in compInfosPost() sanitizes input using strip_tags() with an <iframe> allowlist and regex-based removal of on\w+ event handlers. However, the srcdoc attribute is not an event handler and passes all filters. An attacker with admin settings access can inject an <iframe srcdoc="..."> payload with HTML-entity-encoded JavaScript that executes in the context of the parent page when rendered to unauthenticated frontend visitors. This vulnerability is fixed in 0.31.4.0.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2	Vendor Advisory
https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ci4-cms-erp:ci4ms:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-08 15:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-39390

Mitre link : CVE-2026-39390

CVE.ORG link : CVE-2026-39390

JSON object : View

Products Affected

ci4-cms-erp

ci4ms

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2026-39390", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-39390", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-08T16:09:31.073850Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.3}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 4.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 1.7}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "ci4-cms-erp", "product": "ci4ms", "versions": [{"status": "affected", "version": "< 0.31.4.0"}]}]}], "published": "2026-04-08T15:16:13.750", "references": [{"url": "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2", "tags": ["Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "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 0.31.4.0, the Google Maps iframe setting (cMap field) in compInfosPost() sanitizes input using strip_tags() with an <iframe> allowlist and regex-based removal of on\\w+ event handlers. However, the srcdoc attribute is not an event handler and passes all filters. An attacker with admin settings access can inject an <iframe srcdoc=\"...\"> payload with HTML-entity-encoded JavaScript that executes in the context of the parent page when rendered to unauthenticated frontend visitors. This vulnerability is fixed in 0.31.4.0."}, {"lang": "es", "value": "CI4MS es un esqueleto de CMS basado en CodeIgniter 4 que ofrece una arquitectura modular lista para producci\u00f3n con autorizaci\u00f3n RBAC y soporte de temas. Antes de la versi\u00f3n 0.31.4.0, la configuraci\u00f3n del iframe de Google Maps (campo cMap) en compInfosPost() sanitiza la entrada usando strip_tags() con una lista de permitidos de <iframe> y eliminaci\u00f3n basada en expresiones regulares de los gestores de eventos on\\w+. Sin embargo, el atributo srcdoc no es un gestor de eventos y pasa todos los filtros. Un atacante con acceso a la configuraci\u00f3n de administrador puede inyectar una carga \u00fatil <iframe srcdoc=\"...\"> con JavaScript codificado como entidad HTML que se ejecuta en el contexto de la p\u00e1gina principal cuando se muestra a visitantes no autenticados del frontend. Esta vulnerabilidad se corrige en la versi\u00f3n 0.31.4.0."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ci4-cms-erp:ci4ms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "31F6C77E-A7DD-452A-931A-60B014F90C6E", "versionEndIncluding": "0.31.3.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}