Cross-site scripting in WordPress - CVE-2017-6817
Published: March 10, 2017 / Updated: October 18, 2018
Vulnerability identifier: #VU5935
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2017-6817
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability is caused by incorrect filtration of input data passed via video URL in YouTube embeds (wp-includes/embed.php). A remote attacker with ability to add videos can inject arbitrary HTML and script code and execute it in victim’s browser in security 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.
Affected software
WordPress
Arch Linux
wordpress (Debian package)
Arch Linux
wordpress (Debian package)
How to mitigate CVE-2017-6817
Update to version 4.7.3.
WordPress - update to 4.7.3
wordpress (Debian package) - update to 4.1+dfsg-1+deb8u13
wordpress (Debian package) - update to 4.1+dfsg-1+deb8u13