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Exploited vulnerability · CISA KEV

Is CVE-2023-22518 exploited? Yes: in CISA KEV since 7 Nov 2023

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

Yes. CVE-2023-22518, Atlassian Confluence Data Center and Server Improper Authorization Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 7 Nov 2023, 7 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 · 7 Nov 2023
ransomwareKnownused in campaigns
EPSStop 1%among the most likely CVEs to be exploited
severity10CVSS 3.0 · critical
US federal due28 Nov 2023BOD 22-01 deadline

What it is

Atlassian Confluence Data Center and Server contain an improper authorization vulnerability that can result in significant data loss when exploited by an unauthenticated attacker. There is no impact on confidentiality since the attacker cannot exfiltrate any data.

VendorAtlassian (14 exploited CVEs in KEV)
ProductConfluence Data Center and Server
VulnerabilityAtlassian Confluence Data Center and Server Improper Authorization Vulnerability
WeaknessCWE-863
Published31 Oct 2023
Added to KEV7 Nov 2023
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 31 Oct 2023.
  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-2023-22518 being exploited?

Yes. CISA added CVE-2023-22518 to the Known Exploited Vulnerabilities catalog on 7 Nov 2023, which means there is reliable evidence of exploitation in the wild.

Is CVE-2023-22518 used in ransomware attacks?

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

How do I fix CVE-2023-22518?

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 November 2023 · Atlassian scorecard · act-now radar.

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