CVE-2020-26211

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Summary

CVECVE-2020-26211
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-11-03 21:15:00 UTC
Updated2020-11-16 16:07:00 UTC
DescriptionIn 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.

Risk And Classification

Problem Types: CWE-79

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Bookstackapp Bookstack All All All All
Application Bookstackapp Bookstack All All All All

References

ReferenceSourceLinkTags
XSS and redirect fixes with test cases · BookStackApp/BookStack@bbd1384 · GitHub MISC github.com Patch, Third Party Advisory
Cross-Site Scripting and Redirects Through Page Content · Advisory · BookStackApp/BookStack · GitHub CONFIRM github.com Third Party Advisory
Release BookStack Beta v0.30.4 · BookStackApp/BookStack · GitHub MISC github.com Release Notes, Third Party Advisory
Beta Security Release v0.30.4 · BookStack MISC www.bookstackapp.com Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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