CVE-2020-26260 Information

Description

BookStack is a platform for storing and organising information and documentation. In BookStack before version 0.30.5 a user with permissions to edit a page could set certain image URL’s to manipulate functionality in the exporting system which would allow them to make server side requests and/or have access to a wider scope of files within the BookStack file storage locations. The issue was addressed in BookStack v0.30.5. As a workaround page edit permissions could be limited to only those that are trusted until you can upgrade.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Reference

https://github.com/BookStackApp/BookStack/releases/tag/v0.30.5 https://github.com/BookStackApp/BookStack/security/advisories/GHSA-8wfc-w2r5-x7cr https://bookstackapp.com/blog/beta-release-v0-30-5/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

6.4