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Known exploited vulnerability

CVE-2023-22515

criticalCVSS 3.1 9.8In CISA KEVRansomwareEPSS 99%Published · Atlassian

The short answer

CVE-2023-22515 affects Atlassian Confluence Data Center and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-10-05: attackers are using it, so patch it first.

What it is

Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknown vulnerability in publicly accessible Confluence Data Center and Server instances to create unauthorized Confluence administrator accounts and access Confluence instances. Atlassian Cloud sites are not affected by this vulnerability. If your Confluence site is accessed via an atlassian.net domain, it is hosted by Atlassian and is not vulnerable to this issue.

Weakness: CWE-20.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Oct 5, 2023

Federal due date Oct 13, 2023

EPSS, next 30 days

99%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check all affected Confluence instances for evidence of compromise per vendor instructions and report any positive findings to CISA.

Affected products

Confluence Data Center, Confluence Server. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2023-22515 being exploited?

Yes. CISA added CVE-2023-22515 to its Known Exploited Vulnerabilities catalog on 2023-10-05, with a federal remediation due date of 2023-10-13. CISA lists it as used in ransomware campaigns.

How do I fix CVE-2023-22515?

CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check all affected Confluence instances for evidence of compromise per vendor instructions and report any positive findings to CISA.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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