CVE-2020-2300 Improper Authentication (empty password) in Jenkins Active Directory Plugin

What is CVE-2020-2300?

CVE-2020-2300 is a critical authentication bypass vulnerability in Jenkins Active Directory Plugin, published on 4 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Jenkins Active Directory Plugin 2.19 and earlier does not prohibit the use of an empty password in Windows/ADSI mode, which allows attackers to log in to Jenkins as any user depending on the configuration of the Active Directory server.

Which versions are affected by CVE-2020-2300?

4 open source packages ship an affected version, including org.jenkins-ci.plugins:active-directory. It affects 1 product.

Products include Jenkins Active Directory.

How do I fix CVE-2020-2300?

Upgrade org.jenkins-ci.plugins:active-directory to a fixed version for your release line: 2.16.1 or 2.20.

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

Is CVE-2020-2300 being exploited?

There is no known exploitation of CVE-2020-2300 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Active Directory Plugin

• CVE-2020-2299 Improper Authentication in Jenkins Active Directory Plugin Critical 9.8
• CVE-2020-2301 Authentication cache in Active Directory Jenkins Plugin allows logging in with any password Critical 9.8
• CVE-2017-2649 Jenkins Active Directory Plugin did not verify certificate of AD server High 8.1
• CVE-2019-1003009 Jenkins Active Directory Plugin Improper certificate validation with StartTLS High 7.4
• CVE-2026-48918 Jenkins Active Directory Plugin follows LDAP referrals by default Medium 6.6

Sources

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

Also known as GHSA-8wcw-cw2f-h4g2.