CVE-2018-1000773

WordPress Core < 5.0.1 - PHAR Unserialization

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

WordPress version 4.9.8 and earlier contains a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution due to an incomplete fix for CVE-2017-1000600. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time.

WordPress en versiones 4.9.8 y anteriores contiene una vulnerabilidad de validación de entradas (CWE-20) en el procesamiento de miniaturas que puede resultar en la ejecución remota de código. Esto se debe a una solución incompleta para CVE-2017-1000600. El ataque parece ser explotable mediante una miniatura subida por un usuario autenticado y podría requerir plugins adicionales para su explotación. Sin embargo, esto aún no ha sido confirmado.

WordPress Core versions before 5.0.1 contain a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution due to an incomplete fix for CVE-2017-1000600. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time.

*Credits: Sam Thomas

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

2018-09-05 CVE Reserved
2018-09-06 CVE Published
2024-08-05 CVE Updated
2024-11-01 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-502: Deserialization of Untrusted Data

CAPEC

References (3)

URL	Tag	Source
http://www.securityfocus.com/bid/105306	Third Party Advisory
https://www.theregister.co.uk/2018/08/20/php_unserialisation_wordpress_vuln	Third Party Advisory
https://youtu.be/GePBmsNJw6Y?t=1763	Third Party Advisory

URL	Date	SRC

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
Wordpress Search vendor "Wordpress"		Wordpress Search vendor "Wordpress" for product "Wordpress"				<= 4.9.8 Search vendor "Wordpress" for product "Wordpress" and version " <= 4.9.8"		-		Affected