CASCACascade Atlas

Evidence dossier

CVE-2021-26085

CVE-2021-26085

72.5–88.2Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

State
PUBLISHED
Published
Aug 3, 2021
Updated
Oct 21, 2025
Evidence coverage
85%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS99.94%

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

Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

CISA KEVoriginal assertion
observed_exploitation

Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.999370000000; percentile 0.999690000000

Applicability

Cited product scope

Trace impact →
AtlassianConfluence Data Center
[{"status": "affected", "version": "unspecified", "lessThan": "7.4.10", "versionType": "custom"}, {"status": "affected", "version": "7.5.0", "lessThan": "unspecified", "versionType": "custom"}, {"status": "affected", "version": "unspecified", "lessThan": "7.12.3", "versionType": "custom"}]unknown
AtlassianConfluence Server
[{"status": "affected", "version": "unspecified", "lessThan": "7.4.10", "versionType": "custom"}, {"status": "affected", "version": "7.5.0", "lessThan": "unspecified", "versionType": "custom"}, {"status": "affected", "version": "unspecified", "lessThan": "7.12.3", "versionType": "custom"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*; end excluding 7.4.10supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*; start including 7.5.0; end excluding 7.12.3supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*; end excluding 7.4.10supported
Unknown vendorUnknown product
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*; start including 7.5.0; end excluding 7.12.3supported

Assessments

CVSS by origin

5.3
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0
nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.