Stored XSS in Yoast SEO plugin for WordPress

Published: 2019-07-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-13478
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Yoast SEO
Web applications / Modules and components for CMS

Vendor Joost de Valk

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Stored Cross-site scripting

EUVDB-ID: #VU19142

Risk: Low


CVE-ID: CVE-2019-13478

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No


The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in "/admin/taxonomy/class-taxonomy.php" script. A remote authenticated attacker can post a specially crafted message with XSS payload and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.


Install updates from vendor's website.

Vulnerable software versions

Yoast SEO: 7.0 - 11.5

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?