CVE-2019-9787

WordPress Core < 5.1.1 - Cross-Site Request Forgery to Cross-Site Scripting via Comments

Severity Score

9.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

WordPress before 5.1.1 does not properly filter comment content, leading to Remote Code Execution by unauthenticated users in a default configuration. This occurs because CSRF protection is mishandled, and because Search Engine Optimization of A elements is performed incorrectly, leading to XSS. The XSS results in administrative access, which allows arbitrary changes to .php files. This is related to wp-admin/includes/ajax-actions.php and wp-includes/comment.php.

WordPress, en versiones anteriores a la 5.1.1, no filtra correctamente el contenido, lo que conduce a la ejecución remota de código por parte de usuarios no autenticados en una configuración por defecto. Esto ocurre debido a que la protección CSRF se gestiona de manera incorrecta y porque la optimización del motor de búsqueda de los elementos A se realiza incorrectamente, lo que desemboca en Cross-Site Scripting (XSS). El XSS resulta en un acceso administrativo, lo que permite cambios arbitrarios en archivos .php. Esto está relacionado con wp-admin/includes/ajax-actions.php y wp-includes/comment.php.

*Credits: Simon Scannell

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-03-14 CVE Reserved
2019-03-14 CVE Published
2021-06-29 First Exploit
2024-08-04 CVE Updated
2024-10-31 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-352: Cross-Site Request Forgery (CSRF)

CAPEC

References (9)

URL	Tag	Source
http://www.securityfocus.com/bid/107411	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00044.html	Mailing List
https://wpvulndb.com/vulnerabilities/9230	X_refsource_misc

URL	Date	SRC
https://github.com/dexXxed/CVE-2019-9787	2021-06-29
https://blog.ripstech.com/2019/wordpress-csrf-to-rce	2024-08-04

URL	Date	SRC
https://github.com/WordPress/WordPress/commit/0292de60ec78c5a44956765189403654fe4d080b	2019-03-31

URL	Date	SRC
https://wordpress.org/news/2019/03/wordpress-5-1-1-security-and-maintenance-release	2019-03-31
https://wordpress.org/support/wordpress-version/version-5-1-1	2019-03-31
https://www.debian.org/security/2020/dsa-4677	2019-03-31

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"				< 5.1.1 Search vendor "Wordpress" for product "Wordpress" and version " < 5.1.1"		-		Affected