{"containers": {"cna": {"affected": [{"product": "MyBB Cross-Poster", "vendor": "MyBB Cross-Poster", "versions": [{"lessThanOrEqual": "1.0", "status": "affected", "version": "1.0", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "Thinkland Security Team"}], "datePublic": "2021-10-14T00:00:00", "descriptions": [{"lang": "en", "value": "The MyBB Cross-Poster WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/classes/MyBBXPSettings.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 1.0. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled."}], "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"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Cross-site Scripting (XSS)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-10-15T12:15:41", "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39338"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/BigTiger2020/word-press/blob/main/MyBB%20Cross-Poster.md"}, {"tags": ["x_refsource_MISC"], "url": "https://plugins.trac.wordpress.org/browser/mybb-cross-poster/trunk/classes/MyBBXPSettings.php"}], "solutions": [{"lang": "en", "value": "Uninstall plugin from WordPress site."}], "source": {"discovery": "EXTERNAL"}, "title": "MyBB Cross-Poster <= 1.0 Authenticated Stored Cross-Site Scripting", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"AKA": "Wordfence", "ASSIGNER": "security@wordfence.com", "DATE_PUBLIC": "2021-10-14T13:46:00.000Z", "ID": "CVE-2021-39338", "STATE": "PUBLIC", "TITLE": "MyBB Cross-Poster <= 1.0 Authenticated Stored Cross-Site Scripting"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "MyBB Cross-Poster", "version": {"version_data": [{"version_affected": "<=", "version_name": "1.0", "version_value": "1.0"}]}}]}, "vendor_name": "MyBB Cross-Poster"}]}}, "credit": [{"lang": "eng", "value": "Thinkland Security Team"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The MyBB Cross-Poster WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/classes/MyBBXPSettings.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 1.0. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled."}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"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"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-79 Cross-site Scripting (XSS)"}]}]}, "references": {"reference_data": [{"name": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39338", "refsource": "MISC", "url": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39338"}, {"name": "https://github.com/BigTiger2020/word-press/blob/main/MyBB%20Cross-Poster.md", "refsource": "MISC", "url": "https://github.com/BigTiger2020/word-press/blob/main/MyBB%20Cross-Poster.md"}, {"name": "https://plugins.trac.wordpress.org/browser/mybb-cross-poster/trunk/classes/MyBBXPSettings.php", "refsource": "MISC", "url": "https://plugins.trac.wordpress.org/browser/mybb-cross-poster/trunk/classes/MyBBXPSettings.php"}]}, "solution": [{"lang": "en", "value": "Uninstall plugin from WordPress site."}], "source": {"discovery": "EXTERNAL"}}}}, "cveMetadata": {"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "assignerShortName": "Wordfence", "cveId": "CVE-2021-39338", "datePublished": "2021-10-14T00:00:00", "dateReserved": "2021-08-20T00:00:00", "dateUpdated": "2021-10-15T12:15:41", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.0"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mybb_cross-poster_project:mybb_cross-poster:*:*:*:*:*:wordpress:*:*", "matchCriteriaId": "82E70ADB-8194-4094-A15E-B10503ADC43F", "versionEndIncluding": "1.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "The MyBB Cross-Poster WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/classes/MyBBXPSettings.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 1.0. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled."}, {"lang": "es", "value": "El plugin MyBB Cross-Poster de WordPress es vulnerable a un ataque de tipo Cross-Site Scripting Almacenado debido a una comprobaci\u00f3n insuficiente y saneamiento de entradas por medio de diversos par\u00e1metros encontrados en el archivo ~/classes/MyBBXPSettings.php que permit\u00edan a atacantes con acceso de usuario administrativo inyectar scripts web arbitrarios, en versiones hasta la 1.0 incluy\u00e9ndola. Esto afecta a las instalaciones multi-sitio en las que unfiltered_html est\u00e1 deshabilitado para los administradores, y a los sitios en los que unfiltered_html est\u00e1 deshabilitado"}], "id": "CVE-2021-39338", "lastModified": "2021-10-20T15:38:57.337", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:H/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.7, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}, {"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@wordfence.com", "type": "Secondary"}]}, "published": "2021-10-15T13:15:07.893", "references": [{"source": "security@wordfence.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/BigTiger2020/word-press/blob/main/MyBB%20Cross-Poster.md"}, {"source": "security@wordfence.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://plugins.trac.wordpress.org/browser/mybb-cross-poster/trunk/classes/MyBBXPSettings.php"}, {"source": "security@wordfence.com", "tags": ["Third Party Advisory"], "url": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39338"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security@wordfence.com", "type": "Primary"}]}

{}