November 13, 2026 Follow Egret
CVE-2023-22518 · CVE record: PUBLISHED

Atlassian Confluence Data Center and Server Improper Authorization Vulnerability

Atlassian Confluence Data Center, Atlassian Confluence Server

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.

Exploitation evidence

Known exploited · CISA KEV listed

Added 2023-11-07. Ransomware campaign use: Known.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA due date: 2023-11-28. This is the catalog’s deadline, not an assessment of your organization’s exposure.

KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗

Reported products and versions

Atlassian / Confluence Data Center

Default status: Not specified

  • unaffected: < 1.0.0
  • affected: >= 1.0.0
  • unaffected: >= 7.19.16
  • unaffected: >= 8.3.4
  • unaffected: >= 8.4.4
  • unaffected: >= 8.5.3
  • unaffected: >= 8.6.1

Atlassian / Confluence Server

Default status: Not specified

  • unaffected: < 1.0.0
  • affected: >= 1.0.0
  • unaffected: >= 7.19.16
  • unaffected: >= 8.3.4
  • unaffected: >= 8.4.4
  • unaffected: >= 8.5.3
  • unaffected: >= 8.6.1

Fixes and workarounds

No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.

Sources and related reporting

CVE Program record ↗ · Download tracked evidence as JSON

Observed change timeline

History begins when Egret first downloads each source. It is not the complete upstream CVE history.

12 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-12",
  "epss": 0.99999,
  "percentile": 0.99996
}
10 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.99999,
  "percentile": 0.99996
}
09 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-09",
  "epss": 0.99999,
  "percentile": 0.99996
}
08 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-08",
  "epss": 0.99999,
  "percentile": 0.99996
}
07 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-07",
  "epss": 0.99999,
  "percentile": 0.99996
}
06 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-06",
  "epss": 0.99999,
  "percentile": 0.99996
}
06 Nov 2026, 06:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-05",
  "epss": 0.99999,
  "percentile": 0.99996
}
05 Nov 2026, 00:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T10:13:48.670Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1311473907"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://jira.atlassian.com/browse/CONFSERVER-93142"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/176264/Atlassian-Confluence-Improper-Authorization-Code-Execution.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-22518",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-03T16:33:26.216427Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2023-11-07",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22518"
              },
              "type": "kev"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-863",
                "description": "CWE-863 Incorrect Authorization",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-21T23:05:32.975Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22518"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2023-11-07T00:00:00.000Z",
            "value": "CVE-2023-22518 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Confluence Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "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"
            }
          ]
        },
        {
          "product": "Confluence Server",
          "vendor": "Atlassian",
          "versions": [
            {
              "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"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "-"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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. \n\nAtlassian 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Improper Authorization",
              "lang": "en",
              "type": "Improper Authorization"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-12-19T16:06:15.741Z",
        "orgId": "f08a6ab8-ed46-4c22-8884-d911ccfe3c66",
        "shortName": "atlassian"
      },
      "references": [
        {
          "url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1311473907"
        },
        {
          "url": "https://jira.atlassian.com/browse/CONFSERVER-93142"
        },
        {
          "url": "http://packetstormsecurity.com/files/176264/Atlassian-Confluence-Improper-Authorization-Code-Execution.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f08a6ab8-ed46-4c22-8884-d911ccfe3c66",
    "assignerShortName": "atlassian",
    "cveId": "CVE-2023-22518",
    "datePublished": "2023-10-31T14:30:00.418Z",
    "dateReserved": "2023-01-01T00:01:22.332Z",
    "dateUpdated": "2025-10-21T23:05:32.975Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}
04 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-04",
  "epss": 0.99999,
  "percentile": 0.99996
}
03 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-03",
  "epss": 0.99999,
  "percentile": 0.99996
}
03 Nov 2026, 02:22 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-02",
  "epss": 0.99999,
  "percentile": 0.99996
}
03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed

Stored KEV snapshot at this observation.

{
  "cveID": "CVE-2023-22518",
  "cwes": [
    "CWE-863"
  ],
  "dateAdded": "2023-11-07",
  "dueDate": "2023-11-28",
  "forensicTriage": "No",
  "knownRansomwareCampaignUse": "Known",
  "notes": "https://confluence.atlassian.com/security/cve-2023-22518-improper-authorization-vulnerability-in-confluence-data-center-and-server-1311473907.html;  https://nvd.nist.gov/vuln/detail/CVE-2023-22518",
  "product": "Confluence Data Center and Server",
  "requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
  "shortDescription": "Atlassian Confluence Data Center and Server contain an improper authorization vulnerability that can result in significant data loss when exploited by an unauthenticated attacker. There is no impact on confidentiality since the attacker cannot exfiltrate any data.",
  "vendorProject": "Atlassian",
  "vulnerabilityName": "Atlassian Confluence Data Center and Server Improper Authorization Vulnerability"
}
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