Medium severity6.3NVD Advisory· Published May 7, 2020· Updated Jun 17, 2026
CVE-2020-11055
CVE-2020-11055
Description
In BookStack greater than or equal to 0.18.0 and less than 0.29.2, there is an XSS vulnerability in comment creation. A user with permission to create comments could POST HTML directly to the system to be saved in a comment, which would then be executed/displayed to others users viewing the comment. Through this vulnerability custom JavaScript code could be injected and therefore ran on other user machines. This most impacts scenarios where not-trusted users are given permission to create comments. This has been fixed in 0.29.2.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
ssddanbrown/bookstackPackagist | >= 0.18.0, < 0.29.2 | 0.29.2 |
Affected products
3- Range: >= 0.18.0, < 0.29.2
Patches
Vulnerability mechanics
References
7- jvn.jp/en/jp/JVN41035278/index.htmlnvdThird Party AdvisoryWEB
- bookstackapp.com/blog/beta-release-v0-29-2/nvdRelease NotesVendor Advisory
- github.com/BookStackApp/BookStack/security/advisories/GHSA-5vf7-q87h-pg6wnvdThird Party AdvisoryWEB
- github.com/advisories/GHSA-5vf7-q87h-pg6wghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2020-11055ghsaADVISORY
- bookstackapp.com/blog/beta-release-v0-29-2ghsaWEB
- github.com/BookStackApp/BookStack/releases/tag/v0.29.2nvdRelease NotesWEB
News mentions
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