SB2021102919 - Improper access control in BookStack
Published: October 29, 2021 Updated: November 5, 2021
Security Bulletin ID
SB2021102919
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper access control (CVE-ID: CVE-2021-3906)
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.Remediation
Install update from vendor's website.