CVE-2023-22515

Atlassian Confluence Data Center and Server Broken Access Control

9.8 CRITICALActively exploited (CISA KEV)Used in ransomwarePublic exploitEPSS 99.2%

Published4 Oct 2023
Added to CISA KEV5 Oct 2023
Remediation due13 Oct 2023

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Atlassian Confluence Data Center≥ 8.0.0 < 8.3.3 · ≥ 8.4.0 < 8.4.3 · ≥ 8.5.0 < 8.5.2

Atlassian Confluence Server≥ 8.0.0 < 8.3.3 · ≥ 8.4.0 < 8.4.3 · ≥ 8.5.0 < 8.5.2

Remediation

Fixed in

Atlassian Confluence Data Center≥ 8.3.3

Atlassian Confluence Server≥ 8.3.3

Patch & vendor advisories

References

http://packetstormsecurity.com/files/175225/Atlassian-Confluence-Unauthenticated-Remote-Code-Execution.htmlExploitThird Party AdvisoryVDB Entry
https://confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515Vendor Advisory
https://confluence.atlassian.com/pages/viewpage.action?pageId=1295682276Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-92475Issue TrackingVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22515US Government Resource

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2023-22515 being actively exploited?

Yes. CVE-2023-22515 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 5 Oct 2023. It has been used in ransomware campaigns.

How severe is CVE-2023-22515?

CVE-2023-22515 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 99.2% probability of exploitation.

Which products are affected by CVE-2023-22515?

Affected products include Atlassian Confluence Data Center, Atlassian Confluence Server.

How do I fix CVE-2023-22515?

Upgrade affected software to a fixed version, for example Atlassian Confluence Data Center 8.3.3, Atlassian Confluence Server 8.3.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-22515 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.