CVE-2018-20423 Auth bypass in n/a

High 8.1 Published 24 Dec 2018 Updated 5 Aug 2024

Attackers can bypass disabled registration settings in Discuz! when WeChat login is enabled, allowing unauthorized account creation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-20423?

CVE-2018-20423 is a high-severity authentication bypass vulnerability in n/a, published on 24 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Discuz! DiscuzX 3.4, when WeChat login is enabled, allows remote attackers to bypass a "disabled registration" setting by adding a non-existing wxopenid value to the plugin.php ac=wxregister query string.

Which versions are affected by CVE-2018-20423?

It affects 1 product.

Products include Comsenz Discuzx.

How do I fix CVE-2018-20423?

No fix has been published for CVE-2018-20423 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2018-20423 being exploited?

There is no known exploitation of CVE-2018-20423 in the wild and no public exploit code.

Sources

Also known as GHSA-vj79-v9cw-xm3f.