CVE-2017-17091 Auth bypass in n/a

High 8.8 Published 2 Dec 2017 Updated 5 Aug 2024

Remote attackers can bypass access restrictions in WordPress by deriving the newbloguser key from the user ID, allowing unauthorized actions.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2017-17091?

CVE-2017-17091 is a high-severity authentication bypass vulnerability in Wordpress Wordpress, published on 2 Dec 2017. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

wp-admin/user-new.php in WordPress before 4.9.1 sets the newbloguser key to a string that can be directly derived from the user ID, which allows remote attackers to bypass intended access restrictions by entering this string.

Weakness: CWE-330

Which versions are affected by CVE-2017-17091?

It affects 1 product.

Products include Wordpress Wordpress.

How do I fix CVE-2017-17091?

Upgrade to a fixed version.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2017-17091 being exploited?

There is no known exploitation of CVE-2017-17091 in the wild and no public exploit code.

All Wordpress Wordpress vulnerabilities

Sources

Also known as DEBIAN-CVE-2017-17091, GHSA-9xr7-2f3f-frc6, UBUNTU-CVE-2017-17091.