CVE-2023-22515
CriticalExploitedPublic exploitAtlassian 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…
Published Oct 6, 2023 · Updated Mar 25, 2026 · Also known as TR-23-0569
Key Facts
Patch immediately- CVE-2023-22515 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Confluence Data Center (Atlassian), Confluence Server (Atlassian).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 4, 2023 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 99% probability of exploitation in the next 30 days.
- Fixed versions are available, including Confluence Data Center 8.3.3, Confluence Server 8.3.3.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
99%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Oct 5, 2023 | Oct 13, 2023 | Known |
| Industry KEV feed | Oct 4, 2023 | Oct 13, 2023 | Known |
| CIRCL KEV | Oct 5, 2023 | Oct 13, 2023 | Known |
| ENISA EUVD | Oct 5, 2023 | n/a | Not reported |
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.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Confluence Data CenterAtlassian | >= >= 8.0.0 | 8.3.3 |
| Confluence ServerAtlassian | >= >= 8.0.0 | 8.3.3 |
Patched Releases
Confluence Data Center
8.3.3
Confluence Server
8.3.3
Timeline
Added to Industry KEV feed
Oct 4, 2023
Added to CISA KEV
Oct 5, 2023
Added to CIRCL KEV
Oct 5, 2023
Added to ENISA EUVD
Oct 5, 2023
Publicly disclosed
Oct 6, 2023
Last updated
Mar 25, 2026
Weakness Type
- CWE-20 Improper Input Validation
References
- advisoryhttps://confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515
- advisoryhttps://confluence.atlassian.com/pages/viewpage.action?pageId=1295682276
- advisoryhttps://confluence.atlassian.com/security/cve-2023-22515-broken-access-control-vulnerability-in-confluence-data-center-and-server-1295682276.html
- advisoryhttps://jira.atlassian.com/browse/CONFSERVER-92475
- advisoryhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-22515
FAQ
Common Questions.
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.
Affected: Confluence Data Center (Atlassian) versions >= >= 8.0.0; Confluence Server (Atlassian) versions >= >= 8.0.0. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 4, 2023 and is known to be used in ransomware campaigns.
Yes. It was added on Oct 5, 2023 with a federal remediation due date of Oct 13, 2023.
Public exploit code is available.
Fixed versions are available, including Confluence Data Center 8.3.3, Confluence Server 8.3.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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