CVE-2020-26211

{"containers": {"cna": {"affected": [{"product": "BookStack", "vendor": "BookStackApp", "versions": [{"status": "affected", "version": "< 0.30.4"}]}], "descriptions": [{"lang": "en", "value": "In BookStack before version 0.30.4, a user with permissions to edit a page could insert JavaScript code through the use of `javascript:` URIs within a link or form which would run, within the context of the current page, when clicked or submitted. Additionally, a user with permissions to edit a page could insert a particular meta tag which could be used to silently redirect users to a alternative location upon visit of a page. Dangerous content may remain in the database but will be removed before being displayed on a page. If you think this could have been exploited the linked advisory provides a SQL query to test. As a workaround without upgrading, page edit permissions could be limited to only those that are trusted until you can upgrade although this will not address existing exploitation of this vulnerability. The issue is fixed in BookStack version 0.30.4."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/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": "2020-11-03T21:00:18.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54"}, {"tags": ["x_refsource_MISC"], "url": "https://www.bookstackapp.com/blog/beta-release-v0-30-4/"}], "source": {"advisory": "GHSA-r2cf-8778-3jgp", "discovery": "UNKNOWN"}, "title": "Cross-Site Scripting in BookStack", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2020-26211", "STATE": "PUBLIC", "TITLE": "Cross-Site Scripting in BookStack"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "BookStack", "version": {"version_data": [{"version_value": "< 0.30.4"}]}}]}, "vendor_name": "BookStackApp"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "In BookStack before version 0.30.4, a user with permissions to edit a page could insert JavaScript code through the use of `javascript:` URIs within a link or form which would run, within the context of the current page, when clicked or submitted. Additionally, a user with permissions to edit a page could insert a particular meta tag which could be used to silently redirect users to a alternative location upon visit of a page. Dangerous content may remain in the database but will be removed before being displayed on a page. If you think this could have been exploited the linked advisory provides a SQL query to test. As a workaround without upgrading, page edit permissions could be limited to only those that are trusted until you can upgrade although this will not address existing exploitation of this vulnerability. The issue is fixed in BookStack version 0.30.4."}]}, "impact": {"cvss": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/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/BookStackApp/BookStack/releases/tag/v0.30.4", "refsource": "MISC", "url": "https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4"}, {"name": "https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp", "refsource": "CONFIRM", "url": "https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp"}, {"name": "https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54", "refsource": "MISC", "url": "https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54"}, {"name": "https://www.bookstackapp.com/blog/beta-release-v0-30-4/", "refsource": "MISC", "url": "https://www.bookstackapp.com/blog/beta-release-v0-30-4/"}]}, "source": {"advisory": "GHSA-r2cf-8778-3jgp", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T15:49:07.293Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.bookstackapp.com/blog/beta-release-v0-30-4/"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2020-26211", "datePublished": "2020-11-03T21:00:18.000Z", "dateReserved": "2020-10-01T00:00:00.000Z", "dateUpdated": "2024-08-04T15:49:07.293Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "BookStack", "vendor": "BookStackApp", "versions": [{"status": "affected", "version": "< 0.30.4"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6DF38A5-A44D-4308-933A-A1288591B880", "versionEndExcluding": "0.30.4", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In BookStack before version 0.30.4, a user with permissions to edit a page could insert JavaScript code through the use of `javascript:` URIs within a link or form which would run, within the context of the current page, when clicked or submitted. Additionally, a user with permissions to edit a page could insert a particular meta tag which could be used to silently redirect users to a alternative location upon visit of a page. Dangerous content may remain in the database but will be removed before being displayed on a page. If you think this could have been exploited the linked advisory provides a SQL query to test. As a workaround without upgrading, page edit permissions could be limited to only those that are trusted until you can upgrade although this will not address existing exploitation of this vulnerability. The issue is fixed in BookStack version 0.30.4."}, {"lang": "es", "value": "En BookStack anterior de la versi\u00f3n 0.30.4, un usuario con permisos para editar una p\u00e1gina pod\u00eda insertar c\u00f3digo JavaScript mediante el uso de los URI \"javascript:\" dentro de un enlace o formulario que se ejecutar\u00eda, dentro del contexto de la p\u00e1gina actual, al cliquearse o enviarse .&#xa0;Adem\u00e1s, un usuario con permisos para editar una p\u00e1gina podr\u00eda insertar una etiqueta meta particular que podr\u00eda ser usada para redireccionar silenciosamente a los usuarios hacia una ubicaci\u00f3n alternativa tras visitar una p\u00e1gina.&#xa0;El contenido peligroso puede permanecer en la base de datos, pero ser\u00e1 removido antes de ser mostrado en una p\u00e1gina.&#xa0;Si cree que esto podr\u00eda haber sido explotado, el aviso vinculado proporciona una consulta SQL para probar.&#xa0;Como soluci\u00f3n alternativa sin actualizar, los permisos de edici\u00f3n de p\u00e1gina podr\u00edan ser limitados solo a aquellos en los que se conf\u00eda hasta que pueda actualizar, aunque esto no solucionar\u00e1 la explotaci\u00f3n existente de esta vulnerabilidad"}], "id": "CVE-2020-26211", "lastModified": "2026-06-17T03:07:49.867", "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": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 5.8, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 5.8, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-11-03T21:15:12.547", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54"}, {"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://www.bookstackapp.com/blog/beta-release-v0-30-4/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://www.bookstackapp.com/blog/beta-release-v0-30-4/"}], "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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