Security restrictions bypass in BookStack - CVE-2021-3874
Published: October 11, 2021 / Updated: November 5, 2021
Vulnerability identifier: #VU57180
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-3874
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Dan Brown
Affected software:
BookStack
BookStack
Detailed vulnerability description
The vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due to application does not properly impose security restrictions on HTML export system. A remote authenticated user with permission to update or create pages can export content from files stored within the storage/</code> or <code>public/ directories (Such as application logs).
How to mitigate CVE-2021-3874
Install updates from vendor's website.