CVE-2020-35951

Quiz and Survey Master <= 7.0.0 - Unauthenticated Arbitrary File Deletion

Severity Score

9.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in the Quiz and Survey Master plugin before 7.0.1 for WordPress. It allows users to delete arbitrary files such as wp-config.php file, which could effectively take a site offline and allow an attacker to reinstall with a WordPress instance under their control. This occurred via qsm_remove_file_fd_question, which allowed unauthenticated deletions (even though it was only intended for a person to delete their own quiz-answer files).

Se detectó un problema en el plugin Quiz and Survey Master versiones anteriores a 7.0.1 para WordPress. Permite a los usuarios eliminar archivos arbitrarios, como el archivo wp-config.php, que podría desconectar un sitio de manera efectiva y permitir a un atacante reinstalarlo con una instancia de WordPress bajo su control. Esto ocurrió por medio de la función qsm_remove_file_fd_question, que permitió eliminaciones no autenticadas (aunque solo estaba destinado a que una persona eliminara sus propios archivos de respuestas de cuestionarios).

*Credits: Chloe Chamberland

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-08-03 CVE Published
2021-01-01 CVE Reserved
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-12-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-306: Missing Authentication for Critical Function
CWE-639: Authorization Bypass Through User-Controlled Key

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC
https://wpscan.com/vulnerability/10348	2024-08-04
https://www.wordfence.com/blog/2020/08/critical-vulnerabilities-patched-in-quiz-and-survey-master-plugin	2024-08-04

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
Expresstech Search vendor "Expresstech"		Quiz And Survey Master Search vendor "Expresstech" for product "Quiz And Survey Master"				< 7.0.1 Search vendor "Expresstech" for product "Quiz And Survey Master" and version " < 7.0.1"		wordpress		Affected