Atlassian released emergency patches for a critical remote code execution (RCE) vulnerability (CVE-2025-9115, CVSS 9.8) affecting Confluence Data Center and Server. The flaw allows unauthenticated attackers to execute arbitrary code. CISA has added it to the KEV catalog, confirming active exploitation in the wild.
Business Impact
Confluence often stores sensitive project plans, internal documentation, and knowledge bases. A successful RCE attack allows attackers complete control over the Confluence server, enabling data theft, deployment of ransomware, or lateral movement into other corporate systems.
Why It Happened
The vulnerability exists in how Confluence handles certain web requests, allowing attackers to bypass authentication and achieve code execution. Such flaws in widely deployed collaboration tools are high-value targets for attackers.
Recommended Executive Action
Treat this as a critical emergency. Direct IT teams to apply the Atlassian patches immediately to all affected Confluence instances. Prioritize internet-facing servers. Hunt for IoCs provided by Atlassian and CISA, as systems may already be compromised.
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