Server-Side Request Forgery (SSRF) in BookStack - CVE-2021-3758
Published: September 1, 2021 / Updated: November 5, 2021
Vulnerability identifier: #VU56238
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2021-3758
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
BookStack
BookStack
Software vendor:
Dan Brown
Dan Brown
Description
The disclosed vulnerability allows a remote user to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input in the PDF export feature. A remote user can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
Remediation
Install updates from vendor's website.