CVE-2023-22527 Atlassian Confluence Data Center and Server: command or code injection
In plain words: The program treats text it receives as instructions instead of plain data. The attacker can run commands on the machine — often the whole device is taken over.
Confirmed exploited by CISA on · US federal patch deadline Feb 14, 2024
What to do
- Install Atlassian's security update for Confluence Data Center and Server. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Atlassian Confluence Data Center and Server Template Injection Vulnerability
- Product
- Atlassian Confluence Data Center and Server
- CISA description
- Atlassian Confluence Data Center and Server contain an unauthenticated OGNL template injection vulnerability that can lead to remote code execution.
- Type of flaw
- Command or code injection (CWE-74)
- Confirmed exploited
- Jan 24, 2024 — known to be used in ransomware attacks
- US federal patch deadline
- Feb 14, 2024
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Answering about CVE-2023-22527 ·
Questions about CVE-2023-22527
Is CVE-2023-22527 being exploited?
Yes. CISA added CVE-2023-22527 to its Known Exploited Vulnerabilities catalog on Jan 24, 2024, which means there is reliable evidence of real-world attacks, including by ransomware groups.
How do I fix CVE-2023-22527?
Install Atlassian's security update for Confluence Data Center and Server. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2023-22527?
Only if you use Atlassian Confluence Data Center and Server. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.