Stored XSS in Yoast SEO plugin for WordPress

Published: 2019-07-11 00:30:54 | Updated: 2019-07-11
Severity Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-13478
CVSSv3 5.8 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]
CWE ID CWE-79
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software Yoast SEO
Vulnerable software versions Yoast SEO 11.5
Yoast SEO 11.4
Yoast SEO 11.3

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Vendor URL Joost de Valk

Security Advisory

1) Stored Cross-site scripting

Description

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.

Remediation

Install updates from vendor's website.

External links

https://github.com/Yoast/wordpress-seo/releases/tag/11.6-RC5