OGNL Injection Vulnerability in Confluence Server and Data Center by Atlassian
CVE-2021-26084
Key Information:
- Vendor
Atlassian
- Vendor
- CVE Published:
- 30 August 2021
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What is CVE-2021-26084?
A vulnerability in Confluence Server and Data Center allows an unauthenticated attacker to exploit an OGNL injection flaw. This results in the execution of arbitrary code, posing a serious security risk. The affected versions include those prior to 6.13.23 and specific ranges within versions 6.14.0 to 7.4.11, 7.5.0 to 7.11.6, and 7.12.0 to 7.12.5. Organizations using these versions are advised to monitor for signs of exploitation and apply the necessary security updates.
CISA has reported CVE-2021-26084
CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2021-26084 as being exploited and is known by the CISA as enabling ransomware campaigns.
The CISA's recommendation is: Apply updates per vendor instructions.
Affected Version(s)
Confluence Data Center < 6.13.23
Confluence Data Center 6.14.0
Confluence Data Center < 7.4.11
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
EPSS Score
94% chance of being exploited in the next 30 days.
CVSS V3.1
Timeline
- 🟡
Public PoC available
- 💰
Used in Ransomware
- 👾
Exploit known to exist
- 🦅
CISA Reported
Vulnerability published
Vulnerability Reserved