Stored XSS in WordPress comments functionality

Published: 2019-03-13 09:36:48 | Updated: 2019-03-13
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-9787
CVSSv3 6.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CWE ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software WordPress
Vulnerable software versions WordPress 5.1
WordPress 5.0.4
WordPress 5.0.3

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Vendor URL WordPress.ORG

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 passed as comments. A remote attacker can trick the victim to follow a specially crafted link 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://wordpress.org/news/2019/03/wordpress-5-1-1-security-and-maintenance-release/