Description
In BookStack before version 0.30.4, a user with permissions to edit a page could add an attached link which would execute untrusted JavaScript code when clicked by a viewer of the page. Dangerous content may remain in the database after this update. If you think this could have been exploited the linked advisory provides a SQL query to test. As a workaround, 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 version 0.30.4.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected products
- bookstackapp / bookstack< 0.30.4 – < 0.30.4
References
- VENDOR_ADVISORYhttps://github.com/BookStackApp/BookStack/security/advisories/GHSA-7p2j-4h6p-cq3h
- PATCHhttps://github.com/BookStackApp/BookStack/commit/349162ea139556b2d25e09e155cec84e21cc9227
- MISChttps://bookstackapp.com/blog/beta-release-v0-30-4/
- PATCHhttps://github.com/BookStackApp/BookStack/releases/tag/v0.30.4