CVE-2020-26210 Information

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.

Reference

https://bookstackapp.com/blog/beta-release-v0-30-4/ https://github.com/BookStackApp/BookStack/commit/349162ea139556b2d25e09e155cec84e21cc9227 https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4 https://github.com/BookStackApp/BookStack/security/advisories/GHSA-7p2j-4h6p-cq3h