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Exploited vulnerability · CISA KEV

Is CVE-2023-22527 exploited? Yes: in CISA KEV since 24 Jan 2024

Gociux · Atlassian Confluence Data Center and Server · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2023-22527, Atlassian Confluence Data Center and Server Template Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 24 Jan 2024, 8 days after it was published. It is known to be used in ransomware campaigns. It affects Atlassian Confluence Data Center and Server. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 24 Jan 2024
ransomwareKnownused in campaigns
EPSStop 1%among the most likely CVEs to be exploited
severity10CVSS 3.0 · critical
US federal due14 Feb 2024BOD 22-01 deadline

What it is

Atlassian Confluence Data Center and Server contain an unauthenticated OGNL template injection vulnerability that can lead to remote code execution.

VendorAtlassian (14 exploited CVEs in KEV)
ProductConfluence Data Center and Server
VulnerabilityAtlassian Confluence Data Center and Server Template Injection Vulnerability
WeaknessCWE-74
Published16 Jan 2024
Added to KEV24 Jan 2024
Reported by (CNA)atlassian

What to do

  1. Check whether you run it. Look for Confluence Data Center and Server in your asset inventory, including appliances and cloud images. Stack check lists every exploited Atlassian CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 16 Jan 2024.
  4. Get told next time. Email alerts when CISA adds a CVE for Atlassian.

Other exploited CVEs in Confluence Data Center and Server

References

Questions

Is CVE-2023-22527 being exploited?

Yes. CISA added CVE-2023-22527 to the Known Exploited Vulnerabilities catalog on 24 Jan 2024, which means there is reliable evidence of exploitation in the wild.

Is CVE-2023-22527 used in ransomware attacks?

Yes, CISA lists it as known to be used in ransomware campaigns.

How do I fix CVE-2023-22527?

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check Atlassian's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Confluence Data Center and Server and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in January 2024 · Atlassian scorecard · act-now radar.

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