CASCACascade Atlas

Evidence dossier

CVE-2023-22515

CVE-2023-22515

84.4–99.9Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
Oct 4, 2023
Updated
Mar 25, 2026
Evidence coverage
85%
CISA KEVCatalog member

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.

FIRST EPSS99.16%

2026-07-18 · v2026.06.15 · percentile 99.9%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

atlassianoriginal assertion
container

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.

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

CISA KEVoriginal assertion
observed_exploitation

Atlassian Confluence Data Center and Server Broken Access Control Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.991560000000; percentile 0.999300000000

Applicability

Cited product scope

Trace impact →
AtlassianConfluence Data Center
[{"status": "unaffected", "version": "< 8.0.0"}, {"status": "affected", "version": ">= 8.0.0"}, {"status": "affected", "version": ">= 8.0.1"}, {"status": "affected", "version": ">= 8.0.2"}, {"status": "affected", "version": ">= 8.0.3"}, {"status": "affected", "version": ">= 8.1.3"}, {"status": "affected", "version": ">= 8.1.4"}, {"status": "affected", "version": ">= 8.2.0"}, {"status": "affected", "version": ">= 8.2.1"}, {"status": "affected", "version": ">= 8.2.2"}, {"status": "affected", "version": ">= 8.2.3"}, {"status": "affected", "version": ">= 8.3.0"}, {"status": "affected", "version": ">= 8.3.1"}, {"status": "affected", "version": ">= 8.3.2"}, {"status": "affected", "version": ">= 8.4.0"}, {"status": "affected", "version": ">= 8.4.1"}, {"status": "affected", "version": ">= 8.4.2"}, {"status": "affected", "version": ">= 8.5.0"}, {"status": "affected", "version": ">= 8.5.1"}, {"status": "unaffected", "version": ">= 8.3.3"}, {"status": "unaffected", "version": ">= 8.4.3"}, {"status": "unaffected", "version": ">= 8.5.2"}]unknown
AtlassianConfluence Server
[{"status": "unaffected", "version": "< 8.0.0"}, {"status": "affected", "version": ">= 8.0.0"}, {"status": "affected", "version": ">= 8.0.1"}, {"status": "affected", "version": ">= 8.0.2"}, {"status": "affected", "version": ">= 8.0.3"}, {"status": "affected", "version": ">= 8.1.3"}, {"status": "affected", "version": ">= 8.1.4"}, {"status": "affected", "version": ">= 8.2.0"}, {"status": "affected", "version": ">= 8.2.1"}, {"status": "affected", "version": ">= 8.2.2"}, {"status": "affected", "version": ">= 8.2.3"}, {"status": "affected", "version": ">= 8.3.0"}, {"status": "affected", "version": ">= 8.3.1"}, {"status": "affected", "version": ">= 8.3.2"}, {"status": "affected", "version": ">= 8.4.0"}, {"status": "affected", "version": ">= 8.4.1"}, {"status": "affected", "version": ">= 8.4.2"}, {"status": "affected", "version": ">= 8.5.0"}, {"status": "affected", "version": ">= 8.5.1"}, {"status": "unaffected", "version": ">= 8.3.3"}, {"status": "unaffected", "version": ">= 8.4.3"}, {"status": "unaffected", "version": ">= 8.5.2"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*; start including 8.0.0; end excluding 8.3.3supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*; start including 8.4.0; end excluding 8.4.3supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*; start including 8.5.0; end excluding 8.5.2supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*; start including 8.0.0; end excluding 8.3.3supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*; start including 8.4.0; end excluding 8.4.3supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*; start including 8.5.0; end excluding 8.5.2supported

Assessments

CVSS by origin

9.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0
security@atlassian.comCVSS 3.0 · role SecondaryCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0
atlassianCVSS 3.0 · role unknownCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.