CVE-2020-4421 Auth bypass in WebSphere Application Server Liberty

What is CVE-2020-4421?

CVE-2020-4421 is a medium-severity authentication bypass vulnerability in Ibm Websphere Application Server, published on 6 May 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user using openidconnect to spoof another users identify. IBM X-Force ID: 180084.

Weakness: CWE-290

Which versions are affected by CVE-2020-4421?

It affects 1 product.

Products include Ibm Websphere Application Server.

How do I fix CVE-2020-4421?

No fix has been published for CVE-2020-4421 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-2020-4421 being exploited?

There is no known exploitation of CVE-2020-4421 in the wild and no public exploit code.

Other vulnerabilities in Ibm Websphere Application Server

• CVE-2015-1920 Code injection in n/a Critical 10.0
• CVE-2013-0462 Other in n/a Critical 10.0
• CVE-2011-1377 Security feature bypass in n/a Critical 10.0
• CVE-2010-3186 Other in n/a Critical 10.0
• CVE-2009-1899 Information disclosure in n/a Critical 10.0

All Ibm Websphere Application Server vulnerabilities

Sources

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

Also known as GHSA-c453-37mp-9fx2.