CVE-2020-11055
Medium
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.
SeverityMedium
CVSS6.3
Exploit probability—
Product
Bookstack
PublishedMay 7, 2020
First seenMay 7, 2020
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- bookstackapp bookstack0.29.2 or later
- ssddanbrown/bookstack0.29.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bookstackapp bookstack | 0.18.0 ≤ v < 0.29.2 | 0.29.2 |
| ssddanbrown/bookstackPackagist | 0.18.0 ≤ v < 0.29.2 | 0.29.2 |
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