CVE-2020-11055: Cross-site Scripting in BookStack
First published: Thu May 07 2020(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Bookstackapp Bookstack | >=0.18.0<0.29.2 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2020-11055.
What is the severity of CVE-2020-11055?
The severity of CVE-2020-11055 is medium (CVSS score of 5.4).
What software versions are affected by CVE-2020-11055?
Versions of BookStack greater than or equal to 0.18.0 and less than 0.29.2 are affected by CVE-2020-11055.
What is the impact of CVE-2020-11055?
CVE-2020-11055 allows a user with permission to create comments to execute malicious HTML, which can then be displayed to other users viewing the comment.
How can CVE-2020-11055 be fixed?
The vulnerability can be fixed by updating BookStack to version 0.29.2 or higher.
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