{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-18T18:28:27.707","vulnerabilities":[{"cve":{"id":"CVE-2020-26211","sourceIdentifier":"security-advisories@github.com","published":"2020-11-03T21:15:12.547","lastModified":"2024-11-21T05:19:32.137","vulnStatus":"Modified","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 versión 0.30.4, un usuario con permisos para editar una página podía insertar código JavaScript mediante el uso de los URI \"javascript:\" dentro de un enlace o formulario que se ejecutaría, dentro del contexto de la página actual, al cliquearse o enviarse . Además, un usuario con permisos para editar una página podría insertar una etiqueta meta particular que podría ser usada para redireccionar silenciosamente a los usuarios hacia una ubicación alternativa tras visitar una página. El contenido peligroso puede permanecer en la base de datos, pero será removido antes de ser mostrado en una página. Si cree que esto podría haber sido explotado, el aviso vinculado proporciona una consulta SQL para probar. Como solución alternativa sin actualizar, los permisos de edición de página podrían ser limitados solo a aquellos en los que se confía hasta que pueda actualizar, aunque esto no solucionará la explotación existente de esta vulnerabilidad"}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":1.3,"impactScore":5.8},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","baseScore":8.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.3,"impactScore":5.8}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:S/C:N/I:P/A:N","baseScore":3.5,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"SINGLE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE"},"baseSeverity":"LOW","exploitabilityScore":6.8,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-79"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:*","versionEndExcluding":"0.30.4","matchCriteriaId":"D6DF38A5-A44D-4308-933A-A1288591B880"}]}]}],"references":[{"url":"https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4","source":"security-advisories@github.com","tags":["Release Notes","Third Party Advisory"]},{"url":"https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://www.bookstackapp.com/blog/beta-release-v0-30-4/","source":"security-advisories@github.com","tags":["Patch","Vendor Advisory"]},{"url":"https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes","Third Party Advisory"]},{"url":"https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://www.bookstackapp.com/blog/beta-release-v0-30-4/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"]}]}}]}