How severe is CVE-2023-22515?

CVE-2023-22515 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-22515 being actively exploited?

Yes. CVE-2023-22515 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-10-05, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-22515?

CVE-2023-22515 primarily affects Atlassian Confluence Data Center. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-22515?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-22515 have an EU (EUVD) identifier?

Yes. CVE-2023-22515 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-26655. It is also flagged as exploited in the EUVD (since 2023-10-05).

When was CVE-2023-22515 published?

CVE-2023-22515 was published on 2023-10-04 and last updated on 2026-06-17.

CVE-2023-22515

CVE-2023-22515 is a critical-severity vulnerability in Atlassian Confluence Data Center with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-10-05). The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 99% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-10-05)
EU (EUVD) id: EUVD-2023-26655
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-10-05)
Weakness: CWE-20
Affected product: Atlassian Confluence Data Center
Published: 2023-10-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-22515?: 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.
How severe is CVE-2023-22515?: CVE-2023-22515 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-22515 being actively exploited?: Yes. CVE-2023-22515 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-10-05, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-22515?: CVE-2023-22515 primarily affects Atlassian Confluence Data Center. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-22515?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-22515 have an EU (EUVD) identifier?: Yes. CVE-2023-22515 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-26655. It is also flagged as exploited in the EUVD (since 2023-10-05).
When was CVE-2023-22515 published?: CVE-2023-22515 was published on 2023-10-04 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*

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