BookStack before 26.09.2 contains an incorrect authorization vulnerability in AttachmentController that allows authenticated users to access other users' draft page attachments by ID. Attackers with attachment permissions can enumerate sequential attachment IDs to download, renam...
Product
bookstackapp bookstack vulnerabilities
6 published CVES affecting bookstackapp bookstack, from public sources (CVE.org, NVD, CISA KEV, FIRST EPSS, OSV).
- Total
- 6
- Critical
- 2
- High
- 0
- Medium
- 4
- Low
- 0
- Unscored
- 0
- CISA KEV
- 0
Latest bookstackapp bookstack CVEs
Newest publication first
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MediumCVSS 5.3
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CVE-2026-89022 BookStack < 26.05.5 Authentication Bypass via Social Login Provider Confusion
PublishedCriticalCVSS 9.1BookStack before 26.05.5 contains an authentication bypass vulnerability in its social login implementation that allows unauthenticated attackers to sign in as arbitrary users by authenticating through a different social provider sharing the same driver_id namespace. Attackers ca...
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CriticalCVSS 9.3
BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint that accepts unvalidated base64 content and stores it without content inspection. Attackers with editor permissions can upload SVG files containing scripts that execute in...
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MediumCVSS 5.3
BookStack before 26.05.4 contains a broken access control vulnerability that allows authenticated API users with image-update or image-delete permissions to manipulate other users' avatars by exploiting missing content-type restrictions in the Image Gallery API endpoints. Attacke...
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MediumCVSS 6.9
A weakness has been identified in BookStackApp BookStack up to 26.03. Affected is the function chapterToMarkdown of the file app/Exports/ExportFormatter.php of the component Chapter Export Handler. Executing a manipulation of the argument pages can lead to improper access control...
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MediumCVSS 5.4
BookStack version 0.18.4 is vulnerable to stored cross-site scripting, within the page creation page, which can result in disruption of service and execution of javascript code.
Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.