Main Vulnerability Database Vulnerabilities #VU54980

Blind server-side request forgery (SSRF) in Moodle - CVE-2021-36396

Published: July 19, 2021 / Updated: October 25, 2024

Vulnerability identifier: #VU54980

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]

CVE-ID: CVE-2021-36396

CWE-ID: CWE-918

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can bypass cURL blocked hosts/allowed ports restrictions and trick the application to initiate requests to arbitrary systems.

Affected software

Moodle

How to mitigate CVE-2021-36396

Install updates from vendor's website.

Moodle - addressed in versions 3.9.8, 3.10.5, 3.11.1

Links to Public Exploits and PoC-codes

Exploit #10771 - CVE-2021-36396-Exploit (This script demonstrates a time-based blind SQL injection on Moodle platforms, exploiting response delays to extract data.) (October 25, 2024)

External References

Related Security Bulletins

Multiple vulnerabilities in Moodle