{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47870", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-01-18T12:35:05.171Z", "datePublished": "2026-01-21T17:32:09.385Z", "dateUpdated": "2026-01-21T17:32:09.385Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-01-21T17:32:09.385Z"}, "title": "GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS", "descriptions": [{"lang": "en", "value": "GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability. The plugin attempts to sanitize user input using htmlspecialchars(), but this can be bypassed by passing dangerous characters as escaped hex bytes. This allows attackers to inject arbitrary client-side code that executes in the administrator's browser when visiting a malicious page."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Neutralization of Input During Web Page Generation ('Stored Cross-site Scripting')", "cweId": "CWE-79", "type": "CWE"}]}], "affected": [{"vendor": "GetSimple CMS", "product": "My SMTP Contact Plugin", "versions": [{"version": "1.1.2", "status": "affected"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}, "format": "CVSS"}], "references": [{"url": "https://github.com/boku7/gsSMTP-Csrf2Xss2RCE/", "name": "Full Disclosure Repository", "tags": ["technical-description", "exploit"]}, {"url": "http://get-simple.info", "name": "Vendor Homepage", "tags": ["product"]}, {"url": "https://github.com/GetSimpleCMS/GetSimpleCMS", "name": "GetSimple CMS GitHub Repository", "tags": ["product"]}, {"url": "https://www.exploit-db.com/exploits/49798", "name": "ExploitDB-49798", "tags": ["exploit"]}, {"name": "VulnCheck Advisory: GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/getsimple-cms-my-smtp-contact-plugin-stored-xss"}], "credits": [{"lang": "en", "value": "Bobby Cooke (boku)", "type": "finder"}], "x_generator": {"engine": "vulncheck"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability. The plugin attempts to sanitize user input using htmlspecialchars(), but this can be bypassed by passing dangerous characters as escaped hex bytes. This allows attackers to inject arbitrary client-side code that executes in the administrator's browser when visiting a malicious page."}], "id": "CVE-2021-47870", "lastModified": "2026-01-21T18:16:19.423", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-01-21T18:16:19.423", "references": [{"source": "disclosure@vulncheck.com", "url": "http://get-simple.info"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/GetSimpleCMS/GetSimpleCMS"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/boku7/gsSMTP-Csrf2Xss2RCE/"}, {"source": "disclosure@vulncheck.com", "url": "https://www.exploit-db.com/exploits/49798"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/getsimple-cms-my-smtp-contact-plugin-stored-xss"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

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