CVE-2018-6389 Denial of service in n/a

What is CVE-2018-6389?

CVE-2018-6389 is a high-severity denial of service vulnerability in Wordpress Wordpress, published on 6 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In WordPress through 4.9.2, unauthenticated attackers can cause a denial of service (resource consumption) by using the large list of registered .js files (from wp-includes/script-loader.php) to construct a series of requests to load every file many times.

Weakness: CWE-400

Which versions are affected by CVE-2018-6389?

It affects 1 product.

Products include Wordpress Wordpress.

How do I fix CVE-2018-6389?

No fix has been published for CVE-2018-6389 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-6389 being exploited?

There is no known exploitation of CVE-2018-6389 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry and 22 proofs of concept on GitHub.

Other vulnerabilities in Wordpress Wordpress

• CVE-2026-63030 WordPress Core Interpretation Conflict Exploited Critical 9.8
• CVE-2026-87902 WordPress Core Remote File Inclusion Exploited High 8.1
• CVE-2026-60137 WordPress Core SQL Injection Exploited Medium 5.9
• CVE-2012-2399 Cross-site scripting in n/a Critical 10.0
• CVE-2012-2400 Other in n/a Critical 10.0

All Wordpress Wordpress vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-6389, GHSA-pxcx-cprx-mr28, UBUNTU-CVE-2018-6389.