Remote Code Execution Vulnerability in Moodle's Shibboleth Authentication Plugin
CVE-2021-36394

9.8CRITICAL

Key Information:

Vendor

Moodle
Status
Moodle
Vendor
CVE Published:
6 March 2023

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 20%

What is CVE-2021-36394?

A significant risk has been identified in the Shibboleth authentication plugin for Moodle, allowing for potential remote code execution. This vulnerability can be exploited by an attacker to execute arbitrary code on a system running the affected Moodle version. Users are encouraged to update to the latest version of Moodle to mitigate this risk. For more detailed information and discussions, visit the Moodle community forum.

Affected Version(s)

Moodle 3.11, 3.10 to 3.10.4, 3.9 to 3.9.7 and earlier unsupported versions

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-36394
Created by dinhbaouit

CVE-2021-36394-Pre-Auth-RCE-in-Moodle
Created by lavclash75

References

https://moodle.org/mod/forum/discuss.php?d=424799

EPSS Score

20% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability Reserved

.