Improper access control in BookStack - CVE-2021-4026
Published: December 1, 2021
Vulnerability identifier: #VU58470
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-4026
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in the API attachments read controller. A remote authenticated attacker can bypass implemented security restrictions and obtain confidential attachment data.
Affected software
BookStack
How to mitigate CVE-2021-4026
Install updates from vendor's website.
BookStack - update to 21.11.2