CVE-2021-42362

WordPress Popular Posts <= 5.3.2 Authenticated Arbitrary File Upload

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The WordPress Popular Posts WordPress plugin is vulnerable to arbitrary file uploads due to insufficient input file type validation found in the ~/src/Image.php file which makes it possible for attackers with contributor level access and above to upload malicious files that can be used to obtain remote code execution, in versions up to and including 5.3.2.

El plugin Popular Posts de WordPress es vulnerable a una carga de archivos arbitrarios debido a la insuficiente comprobación del tipo de archivo de entrada encontrada en el archivo ~/src/Image.php que hace posible que atacantes con acceso de nivel de colaborador y superior carguen archivos maliciosos que pueden ser usados para obtener una ejecución de código remota, en versiones hasta la 5.3.2 incluyéndola

*Credits: Original Researcher: Jerome Bruandet, NinTechNet Exploit Author: Simone Cristofaro

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-07-14 First Exploit
2021-10-14 CVE Reserved
2021-11-12 CVE Published
2024-09-07 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-434: Unrestricted Upload of File with Dangerous Type

CAPEC

References (8)

URL	Tag	Source
https://wpscan.com/vulnerability/bd4f157c-a3d7-4535-a587-0102ba4e3009	Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-42362	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/50129	2021-07-15
https://github.com/simonecris/CVE-2021-42362-PoC	2021-07-14
http://packetstormsecurity.com/files/165376/WordPress-Popular-Posts-5.3.2-Remote-Code-Execution.html	2024-09-16
https://blog.nintechnet.com/improper-input-validation-fixed-in-wordpress-popular-posts-plugin	2024-09-16

URL	Date	SRC
https://github.com/cabrerahector/wordpress-popular-posts/commit/d9b274cf6812eb446e4103cb18f69897ec6fe601	2023-11-22
https://plugins.trac.wordpress.org/changeset/2542638/wordpress-popular-posts/trunk/src/Image.php	2023-11-22

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Wordpress Popular Posts Project Search vendor "Wordpress Popular Posts Project"		Wordpress Popular Posts Search vendor "Wordpress Popular Posts Project" for product "Wordpress Popular Posts"				<= 5.3.2 Search vendor "Wordpress Popular Posts Project" for product "Wordpress Popular Posts" and version " <= 5.3.2"		wordpress		Affected