Improper access control in BookStack - CVE-2021-3906
Published: October 29, 2021 / Updated: November 5, 2021
Vulnerability identifier: #VU57801
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-3906
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions to the "/api/pages" endpoint. A remote authenticated user can upload HTML files and perform phishing attacks.Affected software
BookStack
How to mitigate CVE-2021-3906
Install updates from vendor's website.
BookStack - update to 21.10.1