A weakness has been identified in BookStackApp BookStack up to 26.03. Affected is the function chapterToMarkdown of the file app/Exports/ExportFormatter.php of the component Chapter Export Handler. Executing a manipulation of the argument pages can lead to improper access controls.
It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 26.03.1 is able to address this issue.
This patch is called 8a59895ba063040cc8dafd82e94024c406df3d04. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 8
https://github.com/BookStackApp/BookStack/
cna@vuldb.com
https://github.com/BookStackApp/BookStack/commit/8a59895ba063040cc8dafd82e94024…
cna@vuldb.com
https://github.com/BookStackApp/BookStack/releases/tag/v26.03.1
cna@vuldb.com
https://github.com/Ghufran2/CVE-Bookstack/blob/main/Permission%20Bypass%20in%20…
cna@vuldb.com
https://vuldb.com/submit/781762
cna@vuldb.com
https://vuldb.com/vuln/355091
cna@vuldb.com
https://vuldb.com/vuln/355091/cti
cna@vuldb.com
https://www.bookstackapp.com/blog/bookstack-release-v26-03-1/
cna@vuldb.com