VDB-223984 · CVE-2022-40208 · EUVD-2023-0958

Moodle Quiz Web Service logic error

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$5k-$25k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Moodle. This affects an unknown part of the component Quiz Web Service. Executing a manipulation can lead to logic error. The identification of this vulnerability is CVE-2022-40208. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in Moodle (Learning Management Software) (unknown version). This vulnerability affects an unknown code block of the component Quiz Web Service. The manipulation with an unknown input leads to a logic error vulnerability. The CWE definition for the vulnerability is CWE-840. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In Moodle, insufficient limitations in some quiz web services made it possible for students to bypass sequential navigation during a quiz attempt.

The weakness was shared 03/25/2023. The advisory is shared for download at moodle.org. This vulnerability was named CVE-2022-40208 since 09/20/2022. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/03/2025).

The vulnerability scanner Nessus provides a plugin with the ID 260716 (Linux Distros Unpatched Vulnerability : CVE-2022-40208), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (260716) and EUVD (EUVD-2023-0958). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Learning Management Software

Name

Moodle

License

open-source

Website

Product: https://moodle.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Logic error
CWE: CWE-840
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 260716
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2022-40208

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/20/2022 🔍
03/25/2023 +186 days 🔍
03/25/2023 +0 days 🔍
09/03/2025 +893 days 🔍

Sourcesinfo

Product: moodle.org

Advisory: moodle.org
Status: Confirmed

CVE: CVE-2022-40208 (🔍)
GCVE (CVE): GCVE-0-2022-40208
GCVE (VulDB): GCVE-100-223984
EUVD: 🔍

Entryinfo

Created: 03/25/2023 09:18
Updated: 09/03/2025 18:26
Changes: 03/25/2023 09:18 (37), 04/15/2023 08:52 (11), 07/06/2025 15:57 (15), 09/03/2025 18:26 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.