Atlassian Confluence Data Center and Server Template Injection Vulnerability
A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance. Customers using an affected version must take immediate action. Most…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 5 / 5
- KEV catalog (CISA)24 Jan 2024
- Exploited in EUVD (ENISA)24 Jan 2024
- Used by ransomwareyes
- EPSS above 10 %99.98%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance. Customers using an affected version must take immediate action. Most recent supported versions of Confluence Data Center and Server are not affected by this vulnerability as it was ultimately mitigated during regular version updates. However, Atlassian recommends that customers take care to install the latest version to protect their instances from non-critical vulnerabilities outlined in Atlassian’s January Security Bulletin.
Affected products
- 8.4.0
- 8.2.0
- 8.5.1
- 8.5.0
- 8.3.0
- 8.5.3
- 8.1.0
- 8.5.2
- 8.0.0
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
-
Exploitation reported (ENISA)
-
Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 99.98%
References
Other exploited vulnerabilities from the same vendor
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- CVE-2021-26086Atlassian Jira Server and Data Center Path Traversal Vulnerability7.5 · Background exploitation
- CVE-2023-22518Atlassian Confluence Data Center and Server Improper Authorization Vulnerability10.0 · Background exploitation
- CVE-2023-22515Atlassian Confluence Data Center and Server Broken Access Control Vulnerability10.0 · Background exploitation
- CVE-2022-36804Atlassian Bitbucket Server and Data Center Command Injection Vulnerability8.3 · Background exploitation
- CVE-2022-26138Atlassian Questions For Confluence App Hard-coded Credentials Vulnerability9.3 · Background exploitation