Bookstack Cross-site Scripting vulnerability
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | ssddanbrown/bookstack | < 0.30.4 | 0.30.4 |
References
- https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp
- https://nvd.nist.gov/vuln/detail/CVE-2020-26211
- https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54
- https://github.com/BookStackApp/BookStack
- https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4
- https://www.bookstackapp.com/blog/beta-release-v0-30-4
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
ssddanbrown/bookstack- Disclosed
- 24.05.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-ch37-ch8w-cfrq - CC BY 4.0
Vulnerability history: ssddanbrown/bookstack
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 10
- First → latest
- 03.2020 07.2024
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 4
- Medium 5
- Low 1
Disclosures per year
- 2020: 2
- 2021: 4
- 2022: 3
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 0
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Bookstack Cross-site Scripting vulnerability this entry
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