CVE-2023-22518 (GCVE-0-2023-22518)

Vulnerability from cvelistv5 – Published: 2023-10-31 14:30 – Updated: 2025-10-21 23:05
VLAI CISA Shadowserver Previdian
Summary
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.
Severity
10 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-03 16:33 UTC
CWE
  • Improper Authorization
  • CWE-863 - Incorrect Authorization
Assigner
atlassian CNA under the mitre root
CNA scorecard C 61/100 over 10 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Atlassian Confluence Data Center 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
guessed Create a notification for this product.
Atlassian Confluence Server 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
guessed Create a notification for this product.
Credits
-
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: bd02a2d0-e7cc-4f5c-ad6e-065f39d2f053

Vulnerability ID: CVE-2023-22518

Status: Confirmed

Status Updated: 2023-11-07 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-11-07
Asserted: 2023-11-07
Scope
Notes: Atlassian Confluence Data Center and Server Improper Authorization Vulnerability | Affected: Atlassian / Confluence Data Center and Server | Description: 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. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2023-11-28 | Known ransomware campaign use (KEV): Known | Notes (KEV): 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
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-863
Feed CISA Known Exploited Vulnerabilities Catalog
Product Confluence Data Center and Server
Due Date 2023-11-28
Date Added 2023-11-07
Vendorproject Atlassian
Vulnerabilityname Atlassian Confluence Data Center and Server Improper Authorization Vulnerability
Knownransomwarecampaignuse Known
References
Created: 2026-02-02 12:26 UTC | Updated: 2026-11-04 13:36 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 866d12d9-49bf-4aad-909e-98f93e027718

Vulnerability ID: CVE-2023-22518

Status: Confirmed

Status Updated: 2026-11-13 00:00 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2023-11-03
Asserted: 2023-11-03
Last Seen: 2026-11-13
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Atlassian / Confluence | Class: other-software | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-11-13: 15
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 2
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class other-software
7D Avg 5
Vendor Atlassian
30D Avg 3
90D Avg 3
Product Confluence
Cisa Kev yes
Connections 15
Observation Date 2026-11-13
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-06-30 09:23 UTC | Updated: 2026-11-15 01:01 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 441009e5-b5ad-4819-b2f6-83c4b9814450

Vulnerability ID: CVE-2023-22518

Status: Confirmed

Status Updated: 2023-11-07 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-11-07
Asserted: 2023-11-07
Scope
Notes: KEVIntel entry: All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. This Improper Authorization vulnerability allows... | Affected: Atlassian / Confluence Data Center, Confluence Server | CVSS: 9.8 (CRITICAL) | EPSS: 0.99999 | 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 All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. This Improper Authorization vulnerability allows...
Vendor Atlassian
Product Confluence Data Center, Confluence Server
Added Date 2023-11-07T00:00:00.000Z
Cvss Score 9.8
Epss Score 0.99999
Cvss Severity CRITICAL
Epss Percentile 0.99996
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
To clipboard 

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}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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

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.

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    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.