CASCACascade Atlas

Evidence dossier

CVE-2023-22518

CVE-2023-22518

84.5–100.0Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. This Improper Authorization vulnerability allows an unauthenticated attacker to reset Confluence and create a Confluence instance administrator account. Using this account, an attacker can then perform all administrative actions that are available to Confluence instance administrator leading to - but not limited to - full loss of confidentiality, integrity and availability.  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 31, 2023
Updated
Oct 21, 2025
Evidence coverage
85%
CISA KEVCatalog member

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

FIRST EPSS100.00%

2026-07-18 · v2026.06.15 · percentile 100.0%

Source stateNo scored conflict

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

Source comparison

Who said what

atlassianoriginal assertion
container

All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. This Improper Authorization vulnerability allows an unauthenticated attacker to reset Confluence and create a Confluence instance administrator account. Using this account, an attacker can then perform all administrative actions that are available to Confluence instance administrator leading to - but not limited to - full loss of confidentiality, integrity and availability.  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 Improper Authorization Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.999990000000; percentile 0.999960000000

Applicability

Cited product scope

Trace impact →
AtlassianConfluence Data Center
[{"status": "unaffected", "version": "< 1.0.0"}, {"status": "affected", "version": ">= 1.0.0"}, {"status": "unaffected", "version": ">= 7.19.16"}, {"status": "unaffected", "version": ">= 8.3.4"}, {"status": "unaffected", "version": ">= 8.4.4"}, {"status": "unaffected", "version": ">= 8.5.3"}, {"status": "unaffected", "version": ">= 8.6.1"}]unknown
AtlassianConfluence Server
[{"status": "unaffected", "version": "< 1.0.0"}, {"status": "affected", "version": ">= 1.0.0"}, {"status": "unaffected", "version": ">= 7.19.16"}, {"status": "unaffected", "version": ">= 8.3.4"}, {"status": "unaffected", "version": ">= 8.4.4"}, {"status": "unaffected", "version": ">= 8.5.3"}, {"status": "unaffected", "version": ">= 8.6.1"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*; start including 1.0; end excluding 7.19.16supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*; start including 7.20.0; end excluding 8.3.4supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*; start including 8.4.0; end excluding 8.4.4supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*; start including 8.5.0; end excluding 8.5.3supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:8.6.0:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*; start including 1.0; end excluding 7.19.16supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*; start including 7.20.0; end excluding 8.3.4supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*; start including 8.4.0; end excluding 8.4.4supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*; start including 8.5.0; end excluding 8.5.3supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:8.6.0:*:*:*:*:*:*:*supported

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.