CVE-2021-21809

Moodle SpellChecker Path Authenticated Remote Command Execution

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A command execution vulnerability exists in the default legacy spellchecker plugin in Moodle 3.10. A specially crafted series of HTTP requests can lead to command execution. An attacker must have administrator privileges to exploit this vulnerabilities.

Se presenta una vulnerabilidad de ejecución de comandos en el plugin default legacy spellchecker en Moodle versión 3.10. Una serie de peticiones HTTP especialmente diseñadas pueden conllevar a una ejecución de comandos. Un atacante debe tener privilegios de administrador para explotar esta vulnerabilidades

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-04 CVE Reserved
2021-06-22 First Exploit
2021-06-23 CVE Published
2024-08-03 CVE Updated
2024-09-09 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC
https://github.com/anldori/CVE-2021-21809	2022-12-20
http://packetstormsecurity.com/files/164481/Moodle-SpellChecker-Path-Authenticated-Remote-Command-Execution.html	2024-08-03
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1277	2024-08-03
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/moodle_spelling_path_rce.rb	2021-06-22

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Moodle Search vendor "Moodle"		Moodle Search vendor "Moodle" for product "Moodle"				3.10.0 Search vendor "Moodle" for product "Moodle" and version "3.10.0"		-		Affected