What is CVE-2020-26260?

CVE-2020-26260 is a vulnerability in BookStack before version 0.30.5 that allows a user with edit permissions to manipulate image URLs and make server-side requests.

How severe is CVE-2020-26260?

CVE-2020-26260 has a severity rating of medium with a CVSS score of 6.4.

How can CVE-2020-26260 affect BookStack users?

CVE-2020-26260 can affect BookStack users by allowing unauthorized server-side requests and potential manipulation of the exporting system.

How do I fix CVE-2020-26260 in BookStack?

To fix CVE-2020-26260, it is recommended to update BookStack to version 0.30.5 or higher, which includes a fix for this vulnerability.

Where can I find more information about CVE-2020-26260?

More information about CVE-2020-26260 can be found on the BookStackApp website (https://bookstackapp.com/blog/beta-release-v0-30-5/) and GitHub page (https://github.com/BookStackApp/BookStack/releases/tag/v0.30.5).

Vulnerability/
CVE-2020-26260

medium

6.4

CWE

9/12/2020

10/12/2020

CVE-2020-26260

First published: Wed Dec 09 2020(Updated: )

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.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Bookstackapp Bookstack	<0.30.5

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Frequently Asked Questions

What is CVE-2020-26260?
CVE-2020-26260 is a vulnerability in BookStack before version 0.30.5 that allows a user with edit permissions to manipulate image URLs and make server-side requests.
How severe is CVE-2020-26260?
CVE-2020-26260 has a severity rating of medium with a CVSS score of 6.4.
How can CVE-2020-26260 affect BookStack users?
CVE-2020-26260 can affect BookStack users by allowing unauthorized server-side requests and potential manipulation of the exporting system.
How do I fix CVE-2020-26260 in BookStack?
To fix CVE-2020-26260, it is recommended to update BookStack to version 0.30.5 or higher, which includes a fix for this vulnerability.
Where can I find more information about CVE-2020-26260?
More information about CVE-2020-26260 can be found on the BookStackApp website (https://bookstackapp.com/blog/beta-release-v0-30-5/) and GitHub page (https://github.com/BookStackApp/BookStack/releases/tag/v0.30.5).

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