A missing permission check in Jenkins JClouds Plugin 2.14 and earlier in BlobStoreProfile.DescriptorImpl#doTestConnection and JCloudsCloud.DescriptorImpl#doTestConnection allowed users with Overall/Read access to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.
https://github.com/advisories/GHSA-7wxc-7qrg-rg6w
https://jenkins.io/security/advisory/2019-08-07/#SECURITY-1482