Vulnerability-Lookup

CVE-2021-26085 (GCVE-0-2021-26085)

Vulnerability from cvelistv5 – Published: 2021-08-03 00:00 – Updated: 2025-10-21 23:25

CISA Previdian

Summary

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.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: active Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-07 12:29 UTC

CWE

Pre-Authorization Arbitrary File Read
CWE-425 - Direct Request ('Forced Browsing')

Assigner

atlassian CNA under the mitre root

CNA scorecard C 61/100 over 10 records in the last 180 days details

References

3 references

URL	Tags
https://jira.atlassian.com/browse/CONFSERVER-67893	x_refsource_MISC
http://packetstormsecurity.com/files/164401/Atlas…	x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

2 products

Vendor	Product	Version	CPE status
Atlassian	Confluence Server	Affected: unspecified , < 7.4.10 (custom) Affected: 7.5.0 , < unspecified (custom) Affected: unspecified , < 7.12.3 (custom)	guessed
Atlassian	Confluence Data Center	Affected: unspecified , < 7.4.10 (custom) Affected: 7.5.0 , < unspecified (custom) Affected: unspecified , < 7.12.3 (custom)	guessed

Date Public

2021-07-29 00:00

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 8b0072f5-f85e-4406-8ef8-aae614fb5cae

Vulnerability ID: CVE-2021-26085

Status: Confirmed

Status Updated: 2022-03-28 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2022-03-28

Asserted: 2022-03-28

Scope

Notes: Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability | Affected: Atlassian / Confluence Server | Description: 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. | Required action: Apply updates per vendor instructions. | Due date: 2022-04-18 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-26085

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details

Cwes	CWE-425
Feed	CISA Known Exploited Vulnerabilities Catalog
Product	Confluence Server
Due Date	2022-04-18
Date Added	2022-03-28
Vendorproject	Atlassian
Vulnerabilityname	Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability
Knownransomwarecampaignuse	Known

References

CVE-2021-26085

Created: 2026-02-02 12:27 UTC | Updated: 2026-11-04 13:35 UTC

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: bd91315d-3fd6-4894-98d9-4d11b683acff

Vulnerability ID: CVE-2021-26085

Status: Confirmed

Status Updated: 2022-03-28 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2022-03-28

Asserted: 2022-03-28

Scope

Notes: KEVIntel entry: Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read... | Affected: Atlassian / Confluence Server, Confluence Data Center | CVSS: 5.3 (MEDIUM) | Used in malware: yes | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Confirmed Compromise

Confidence: 70%

Source: kevintel

Details

Feed	KEVIntel (kevintel.com)
Title	Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read...
Vendor	Atlassian
Product	Confluence Server, Confluence Data Center
Added Date	2022-03-28T00:00:00.000Z
Cvss Score	5.3
Epss Score	None
Cvss Severity	MEDIUM
Epss Percentile	None
Used In Malware	yes
Ahead Of Cisa Kev	None
Not Yet In Cisa Kev	False

References

Created: 2026-06-23 14:05 UTC | Updated: 2026-07-10 06:14 UTC

Show details on NVD website

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}

CERTFR-2021-AVI-677

Vulnerability from certfr_avis - Published: - Updated:

De multiples vulnérabilités ont été découvertes dans Atlassian Confluence Server et Data Center. Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance et une atteinte à la confidentialité des données.

La vulnérabilité CVE-2021-26084 est activement exploitée. De plus, des codes d'exploitation sont disponibles publiquement sur Internet.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

Vendor	Product	Description
Atlassian	Confluence	Atlassian Confluence Server et Data Center versions 7.12.x antérieures à 7.12.5
Atlassian	Confluence	Atlassian Confluence Server et Data Center versions antérieures à 6.13.23
Atlassian	Confluence	Atlassian Confluence Server et Data Center versions 7.5.x à 7.11.x antérieures à 7.11.6
Atlassian	Confluence	Atlassian Confluence Server et Data Center versions 6.14.x à 7.4.x antérieures à 7.4.11

References

Title

Publication Time

CERTFR-2021-AVI-677

Vulnerability from certfr_avis - Published: - Updated:

La vulnérabilité CVE-2021-26084 est activement exploitée. De plus, des codes d'exploitation sont disponibles publiquement sur Internet.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

Vendor	Product	Description
Atlassian	Confluence	Atlassian Confluence Server et Data Center versions 7.12.x antérieures à 7.12.5
Atlassian	Confluence	Atlassian Confluence Server et Data Center versions antérieures à 6.13.23
Atlassian	Confluence	Atlassian Confluence Server et Data Center versions 7.5.x à 7.11.x antérieures à 7.11.6
Atlassian	Confluence	Atlassian Confluence Server et Data Center versions 6.14.x à 7.4.x antérieures à 7.4.11

References

Title

Publication Time

BDU:2022-02440 (CVE-2021-26085)

Vulnerability from fstec – Published: 2022-04-20 – Updated: 2024-09-24 – View on bdu.fstec.ru Exploit publicly available Yes Fixed

CISA Previdian

Title

Уязвимость веб-сервера Atlassian Confluence Server, связанная с ошибками авторизации, позволяющая нарушителю читать произвольные файлы

Summary

Уязвимость веб-сервера Atlassian Confluence Server связана с ошибками авторизации. Эксплуатация уязвимости может позволить нарушителю, действующему удалённо, читать произвольные файлы

Severity

5.0 (Medium) CVSS 2.0


                      
                        AV:N/AC:L/Au:N/C:P/I:N/A:N

5.3 (Medium) CVSS 3.0


                      
                        CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Class

Architecture vulnerability

Status

Confirmed by the vendor

Exploitation

Authorization bypass

Incidents

Yes

Remediation

Software update

CWE

CWE-862 - Отсутствие авторизации

Aliases

CVE-2021-26085

References

4 references

URL
http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-A…
https://jira.atlassian.com/browse/CONFSERVER-67893
https://nvd.nist.gov/vuln/detail/CVE-2021-26085
https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv

Impacted products

1 product from 1 vendor

Vendors

Atlassian

Products

Confluence Server

Versions

от 7.5.0 до 7.12.3 (Confluence Server), до 7.4.10 (Confluence Server)

Product types

Application software

Mitigations

Использование рекомендаций: https://jira.atlassian.com/browse/CONFSERVER-67893

JSON

To clipboard

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  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u0435\u0431-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Atlassian Confluence Server, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438 \u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u0438, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0447\u0438\u0442\u0430\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0435 \u0444\u0430\u0439\u043b\u044b",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0435",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435 \u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u0438 (CWE-862)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u0435\u0431-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Atlassian Confluence Server \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438 \u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u0438. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e, \u0447\u0438\u0442\u0430\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0435 \u0444\u0430\u0439\u043b\u044b",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041d\u0430\u0440\u0443\u0448\u0435\u043d\u0438\u0435 \u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html\t\nhttps://jira.atlassian.com/browse/CONFSERVER-67893\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-26085\nhttps://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041f\u0440\u0438\u043a\u043b\u0430\u0434\u043d\u043e\u0435 \u041f\u041e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-862",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5)\n\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5,3)"
}

FKIE_CVE-2021-26085

Vulnerability from fkie_nvd - Published: 2021-08-03 00:15 - Updated: 2026-06-17 03:42

CISA Previdian

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Summary

References

URL	Tags
security@atlassian.com	http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html	Exploit, Third Party Advisory, VDB Entry
security@atlassian.com	https://jira.atlassian.com/browse/CONFSERVER-67893	Issue Tracking, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html	Exploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108	https://jira.atlassian.com/browse/CONFSERVER-67893	Issue Tracking, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26085	US Government Resource

Impacted products

Vendor	Product	Version
atlassian	confluence_data_center	*
atlassian	confluence_data_center	*
atlassian	confluence_server	*
atlassian	confluence_server	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Confluence Server",
          "vendor": "Atlassian",
          "versions": [
            {
              "lessThan": "7.4.10",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThan": "unspecified",
              "status": "affected",
              "version": "7.5.0",
              "versionType": "custom"
            },
            {
              "lessThan": "7.12.3",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Confluence Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "lessThan": "7.4.10",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThan": "unspecified",
              "status": "affected",
              "version": "7.5.0",
              "versionType": "custom"
            },
            {
              "lessThan": "7.12.3",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "security@atlassian.com"
    }
  ],
  "cisaActionDue": "2022-04-18",
  "cisaExploitAdd": "2022-03-28",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "83557716-7A48-48D5-85A9-4A29DBF4F511",
              "versionEndExcluding": "7.4.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6A310D77-1FFF-4FFE-AD50-75DFF973EB3F",
              "versionEndExcluding": "7.12.3",
              "versionStartIncluding": "7.5.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4BA04112-3B97-491B-93E6-80C444274430",
              "versionEndExcluding": "7.4.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B1148DF0-42C0-435F-A6EB-EFA93E10E8D7",
              "versionEndExcluding": "7.12.3",
              "versionStartIncluding": "7.5.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Las versiones afectadas de Atlassian Confluence Server permiten a los atacantes remotos visualizar recursos restringidos por medio de una vulnerabilidad de lectura arbitraria de archivos de autorizaci\u00f3n previa en el endpoint /s/.\u0026#xa0;Las versiones afectadas son anteriores a la versi\u00f3n 7.4.10 y desde la versi\u00f3n 7.5.0 anteriores a 7.12.3"
    }
  ],
  "id": "CVE-2021-26085",
  "lastModified": "2026-06-17T03:42:49.933",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-26085",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-02-07T12:29:39.323995Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-08-03T00:15:08.557",
  "references": [
    {
      "source": "security@atlassian.com",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html"
    },
    {
      "source": "security@atlassian.com",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://jira.atlassian.com/browse/CONFSERVER-67893"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://jira.atlassian.com/browse/CONFSERVER-67893"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26085"
    }
  ],
  "sourceIdentifier": "security@atlassian.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-425"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-425"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

GHSA-8MJC-QHQ2-3XM8

Vulnerability from github – Published: 2022-05-24 19:09 – Updated: 2025-10-22 00:32

Details

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-26085"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-425",
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-08-03T00:15:00Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-8mjc-qhq2-3xm8",
  "modified": "2025-10-22T00:32:18Z",
  "published": "2022-05-24T19:09:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-26085"
    },
    {
      "type": "WEB",
      "url": "https://jira.atlassian.com/browse/CONFSERVER-67893"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26085"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GSD-2021-26085

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

Aliases

CVE-2021-26085

Aliases

CVE-2021-26085

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-26085",
    "description": "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.",
    "id": "GSD-2021-26085",
    "references": [
      "https://packetstormsecurity.com/files/cve/CVE-2021-26085"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-26085"
      ],
      "details": "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.",
      "id": "GSD-2021-26085",
      "modified": "2023-12-13T01:23:33.623635Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cisa.gov": {
      "cveID": "CVE-2021-26085",
      "dateAdded": "2022-03-28",
      "dueDate": "2022-04-18",
      "product": "Confluence Server",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "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.",
      "vendorProject": "Atlassian",
      "vulnerabilityName": "Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability"
    },
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security@atlassian.com",
        "DATE_PUBLIC": "2021-07-29T00:00:00",
        "ID": "CVE-2021-26085",
        "STATE": "PUBLIC"
      },
      "affects": {
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          "vendor_data": [
            {
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                "product_data": [
                  {
                    "product_name": "Confluence Server",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_value": "7.4.10"
                        },
                        {
                          "version_affected": "\u003e=",
                          "version_value": "7.5.0"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_value": "7.12.3"
                        }
                      ]
                    }
                  },
                  {
                    "product_name": "Confluence Data Center",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_value": "7.4.10"
                        },
                        {
                          "version_affected": "\u003e=",
                          "version_value": "7.5.0"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_value": "7.12.3"
                        }
                      ]
                    }
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          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "Pre-Authorization Arbitrary File Read"
              }
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          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://jira.atlassian.com/browse/CONFSERVER-67893",
            "refsource": "MISC",
            "url": "https://jira.atlassian.com/browse/CONFSERVER-67893"
          },
          {
            "name": "http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html",
            "refsource": "MISC",
            "url": "http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "7.4.10",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "7.12.3",
                "versionStartIncluding": "7.5.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*",
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                "versionEndExcluding": "7.12.3",
                "versionStartIncluding": "7.5.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "7.4.10",
                "vulnerable": true
              }
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      "cve": {
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
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                  "value": "CWE-862"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "N/A",
              "refsource": "N/A",
              "tags": [
                "Issue Tracking",
                "Vendor Advisory"
              ],
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            },
            {
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                "Exploit",
                "Third Party Advisory",
                "VDB Entry"
              ],
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            }
          ]
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
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            "attackVector": "NETWORK",
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            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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          "impactScore": 1.4
        }
      },
      "lastModifiedDate": "2022-06-10T14:25Z",
      "publishedDate": "2021-08-03T00:15Z"
    }
  }
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2021-26085 (GCVE-0-2021-26085)

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Vendor Report Successful Exploitation Confidence: 80% Source: cisa-kev

Details

References

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Confirmed Compromise Confidence: 70% Source: kevintel

Details

References

CERTFR-2021-AVI-677

Solution

CERTFR-2021-AVI-677

Solution

BDU:2022-02440 (CVE-2021-26085)

FKIE_CVE-2021-26085

GHSA-8MJC-QHQ2-3XM8

GSD-2021-26085

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour