CVE-2020-2306 Missing Authorization in Jenkins Mercurial Plugin

What is CVE-2020-2306?

CVE-2020-2306 is a medium-severity missing authorization vulnerability in Jenkins Mercurial Plugin, published on 4 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A missing permission check in Jenkins Mercurial Plugin 2.11 and earlier allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Which versions are affected by CVE-2020-2306?

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

Products include Jenkins Mercurial.

How do I fix CVE-2020-2306?

Upgrade org.jenkins-ci.plugins:mercurial to a fixed version for your release line: 2.8.1, 2.10.1, 2.12 or 2.9.1.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-2306 being exploited?

There is no known exploitation of CVE-2020-2306 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Mercurial Plugin

• CVE-2022-30948 Path traversal in Jenkins Mercurial Plugin High 7.5
• CVE-2020-2305 XXE vulnerability in Jenkins Mercurial Plugin Medium 6.5
• CVE-2022-43410 Webhook endpoint discloses job names to unauthorized users in Jenkins Mercurial Plugin Medium 5.3
• CVE-2018-1000112 Incorrect Authorization in Jenkins Mercurial Plugin Medium 5.3

Sources

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

Also known as GHSA-vrrc-3wwh-frgx.