CVE-2021-29434

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Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch)."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "{\"CWE-79\":\"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\"}", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-04-19T18:45:14.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx"}, {"tags": ["x_refsource_MISC"], "url": "https://pypi.org/project/wagtail/"}], "source": {"advisory": "GHSA-wq5h-f9p5-q7fx", "discovery": "UNKNOWN"}, "title": "Improper validation of URLs ('Cross-site Scripting') in Wagtail rich text fields", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-29434", "STATE": "PUBLIC", "TITLE": "Improper validation of URLs ('Cross-site Scripting') in Wagtail rich text fields"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "wagtail", "version": {"version_data": [{"version_value": "<= 2.11.6"}, {"version_value": ">= 2.12, <= 2.12.3"}]}}]}, "vendor_name": "wagtail"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Wagtail is a Django content management system. 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Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch)."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "{\"CWE-79\":\"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\"}"}]}]}, "references": {"reference_data": [{"name": "https://github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx", "refsource": "CONFIRM", "url": "https://github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx"}, {"name": "https://pypi.org/project/wagtail/", "refsource": "MISC", "url": "https://pypi.org/project/wagtail/"}]}, "source": {"advisory": "GHSA-wq5h-f9p5-q7fx", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T22:02:51.911Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://pypi.org/project/wagtail/"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2021-29434", "datePublished": "2021-04-19T18:45:14.000Z", "dateReserved": "2021-03-30T00:00:00.000Z", "dateUpdated": "2024-08-03T22:02:51.911Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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In affected versions of Wagtail, when saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with `javascript:` URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. See referenced GitHub advisory for additional details, including a workaround. Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch)."}, {"lang": "es", "value": "Wagtail es un sistema de gesti\u00f3n de contenido de Django.&#xa0;En las versiones afectadas de Wagtail, al guardar el contenido de un campo de texto enriquecido en la interfaz de administraci\u00f3n, Wagtail no aplica comprobaciones del lado del servidor para garantizar a las URL de los enlaces usar un protocolo v\u00e1lido.&#xa0;Un usuario malicioso con acceso a la interfaz de administraci\u00f3n podr\u00eda entonces dise\u00f1ar una petici\u00f3n POST para publicar contenido con URLs \"javascript:\" que contengan c\u00f3digo arbitrario.&#xa0;La vulnerabilidad no es explotable por un visitante ordinario del sitio sin acceso al administrador de Wagtail.&#xa0;V\u00e9ase el aviso de GitHub al que se hace referencia para obtener detalles adicionales, incluyendo una soluci\u00f3n alternativa.&#xa0;Las versiones parcheadas ha sido lanzadas como Wagtail versi\u00f3n 2.11.7 (para la rama LTS 2.11) y Wagtail versi\u00f3n 2.12.4 (para la rama 2.12 actual)"}], "id": "CVE-2021-29434", "lastModified": "2026-06-17T03:47:38.060", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 3.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.8, "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": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}, {"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"}]}, "published": "2021-04-19T19:15:17.610", "references": [{"source": "security-advisories@github.com", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx"}, {"source": "security-advisories@github.com", "tags": ["Product", "Third Party Advisory"], "url": "https://pypi.org/project/wagtail/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product", "Third Party Advisory"], "url": "https://pypi.org/project/wagtail/"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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