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CVE-2017-6817: WordPress permits harmful YouTube embed to execute code

CVE-2017-6817 · published 9 years ago

Summary

Versions of WordPress earlier than 4.7.3 let a logged‑in user place a crafted YouTube link that can run unwanted scripts in a browser. This could let an attacker display false information or capture session data from other users. Upgrade WordPress to the latest version (or apply the security patch) and ensure any Debian WordPress packages are also updated.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
wordpress	wordpress	<= 4.7.2 `cpe:2.3:a:wordpress:wordpress::::::::`
debian	debian_linux	8.0 9.0 `cpe:2.3:o:debian:debian_linux:8.0:::::::*`

Original advisory text

In WordPress before 4.7.3 (wp-includes/embed.php), there is authenticated Cross-Site Scripting (XSS) in YouTube URL Embeds.

References

http://www.debian.org/security/2017/dsa-3815 Third Party Advisory
http://www.securityfocus.com/bid/96601 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037959 Third Party Advisory VDB Entry
https://codex.wordpress.org/Version_4.7.3 Patch Vendor Advisory
https://github.com/WordPress/WordPress/commit/419c8d97ce8df7d5004ee0b566bc5e095f... Issue Tracking Patch Third Party Advisory
https://wordpress.org/news/2017/03/wordpress-4-7-3-security-and-maintenance-rele... Patch Release Notes Vendor Advisory
https://wpvulndb.com/vulnerabilities/8768 Patch Third Party Advisory

Fix within

Internet-facing 60 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit (estimated)
Gives an attacker partial control (estimated)

Severity

5.4 Medium

Exploitation

2% chance of attack within 30 days

Type

CWE-79Cross-site Scripting (XSS)

Timeline

Published12 Mar 2017

Updated4 Nov 2026

First seen29 Sep 2026

Sources

CVE-2017-6817 · NVD

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