Mark WaiteJenkins maintainer, with R. Tyler CroyJenkins project
Open-source project. Self-hosted Confluence wiki, read-only since October 2019. Disclosed September 4, 2021.
Jenkins Blog, published Read the write-up (opens Jenkins Blog in a new tab)
Observation
Attackers used a Confluence flaw to plant a crypto miner on the Jenkins project's wiki, and the project shut the wiki down for good.
- Takeaway
- Patch or retire self-managed Confluence servers on Atlassian's schedule; a read-only wiki left online was enough to compromise Jenkins' infrastructure.
- What happened
- Attackers used Confluence CVE-2021-26084 to install what the Jenkins team believes was a Monero miner in the container running its deprecated, self-hosted Confluence wiki. The infrastructure team took the service offline permanently, rotated privileged credentials, reset accounts in its shared identity system and paused releases while it checked the scope.
“At this time, the Jenkins infrastructure team has permanently disabled the Confluence service, rotated privileged credentials, and taken proactive measures to further reduce the scope of access across our infrastructure.”
- Public engineering write-up
- Investigated by the project's infrastructure team
Deployment details
Open-source project. Self-hosted Confluence wiki, read-only since October 2019. Disclosed September 4, 2021.
- Public engineering write-up
- Investigated by the project's infrastructure team
- Team
- Jenkins infrastructure team
- Duration
- Wiki read-only from October 2019; breach disclosed September 4, 2021
- Workload
- Self-hosted project wiki
- Product version
- Confluence Server, self-managed




