CVE-2020-26260 : What You Need to Know
Learn about CVE-2020-26260, a vulnerability in BookStack allowing unauthorized server-side requests and file access. Find mitigation steps and update recommendations here.
BookStack is a platform for storing and organizing information and documentation. In versions prior to 0.30.5, a vulnerability allowed users with page edit permissions to manipulate image URLs, potentially leading to server-side requests and unauthorized access to files. This issue was resolved in version 0.30.5.
Understanding CVE-2020-26260
What is CVE-2020-26260?
CVE-2020-26260 is a vulnerability in BookStack that could be exploited by users with specific permissions to perform server-side request forgery.
The Impact of CVE-2020-26260
The vulnerability could allow malicious users to make unauthorized server-side requests and access files within BookStack's storage.
Technical Details of CVE-2020-26260
Vulnerability Description
Users with edit permissions could manipulate image URLs to exploit the exporting system, potentially leading to server-side requests and unauthorized file access.
Affected Systems and Versions
- Product: BookStack
- Vendor: BookStackApp
- Versions Affected: >= v0.7, < v0.30.5
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Privileges Required: Low
- User Interaction: None
- Scope: Changed
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: None
Mitigation and Prevention
Immediate Steps to Take
- Upgrade to version 0.30.5 or later to mitigate the vulnerability.
- Limit page edit permissions to trusted users until the upgrade is completed.
Long-Term Security Practices
- Regularly update BookStack to the latest version to patch known vulnerabilities.
Patching and Updates
- Apply patches and updates provided by BookStack to ensure the security of the platform.