{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39390", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-06T22:06:40.516Z", "datePublished": "2026-04-08T14:29:28.500Z", "dateUpdated": "2026-04-08T16:13:16.580Z"}, "containers": {"cna": {"title": "CI4MS has Stored XSS via srcdoc attribute bypass in Google Maps iframe setting", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2"}], "affected": [{"vendor": "ci4-cms-erp", "product": "ci4ms", "versions": [{"version": "< 0.31.4.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-08T14:29:28.500Z"}, "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."}], "source": {"advisory": "GHSA-x3hr-cp7x-44r2", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-08T16:09:31.073850Z", "id": "CVE-2026-39390", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-08T16:13:16.580Z"}}]}}

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{"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 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."}], "id": "CVE-2026-39390", "lastModified": "2026-04-08T21:26:13.410", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-08T15:16:13.750", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,0.31.4.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "ci4ms", "source": "cna", "vendor": "ci4-cms-erp"}, "product": "ci4ms", "vendor": "ci4-cms-erp"}], "analysis": {"en": {"generated_at": "2026-04-08T16:23:31.913892+00:00", "value": {"mitigation_remediation": ["Upgrade to CI4MS\u00a00.31.4.0 or later to apply the fixed srcdoc filtering logic.", "If an immediate upgrade is not possible, remove or disable the Google Maps iframe feature or enforce a stricter whitelist that excludes the srcdoc attribute.", "Apply a temporary filter to strip or neutralize srcdoc attributes before storing the value.", "Audit and rotate administrative credentials; ensure that only trusted users have access to the settings.", "Monitor the compInfosPost() data for unexpected iframe tags or encoded scripts and retract any malicious content if discovered."], "summary": {"action": "Patch Immediately", "impact": "Stored Cross\u2011Site Scripting via srcdoc attribute bypass"}, "threat_synthesis": {"affected_systems": "The vulnerability exists in all CI4MS versions prior to 0.31.4.0. The susceptible component is compInfosPost() handling the cMap field. Only users with administrative privileges can create or alter this field, so an attacker first needs to compromise or abuse admin credentials. Once stored, the payload propagates to every visitor of the rendered page.", "description_and_impact": "CI4MS, a CodeIgniter\u00a04 CMS skeleton, contains a stored cross\u2011site scripting flaw in the Google Maps iframe configuration. Administrators edit the cMap field and the input is filtered with strip_tags() and a regex that removes onW+ event handlers. The filter does not guard the srcdoc attribute, so an attacker can inject an iframe element with encoded JavaScript in the srcdoc value. The script runs in the browser of any unauthenticated visitor who views the affected page, allowing cookie theft, page defacement, or further malicious actions.", "risk_and_exploitability": "The CVSS score of 5.5 indicates moderate severity; EPSS is not available and the flaw is not listed in KEV, suggesting no known widespread exploitation. However, the attack requires admin access\u2014a significant hurdle\u2014yet the impact is serious because injected code runs with the victim\u2019s browser privileges. Organizations running vulnerable CI4MS installations should treat the flaw as high\u2011priority, especially if unpatched admin accounts or insufficient monitoring for unexpected iframe content exist."}}}}, "created": "2026-04-08T19:26:56.768307+00:00", "updated": "2026-04-08T19:39:21.572554+00:00", "vendors": ["ci4-cms-erp", "ci4-cms-erp$PRODUCT$ci4ms"]}