
CVE-2021-26084 Confluence OGNL Injection: Mass Exploit
CVE-2021-26084 is a server-side template injection vulnerability in Atlassian Confluence Server and Data Center. An unauthenticated attacker can inject OGNL expressions via query parameters, achieving remote code execution on the Confluence server. The vulnerability was exploited at mass scale within hours of public PoC release, with ransomware groups and nation-state actors among the first adopters.
