Exploited CVEs / Atlassian / CVE-2023-22518
CVE-2023-22518
Atlassian Confluence Data Center and Server Improper Authorization Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2023-11-28 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Atlassian Security Advisories, linked below.
Actively exploited Atlassian Confluence Data Center and Server vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2023-11-07.
Risk summary
Updated July 26, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2023-22518
This improper authorization flaw in Atlassian Confluence Data Center and Server lets an unauthenticated attacker cause significant data loss, and unusually it has no confidentiality impact because data cannot be exfiltrated. It carries an EPSS exploit probability of 100 percent, sits in CISA KEV since 2023-11-07, and has been used in ransomware campaigns, so any internet-reachable Confluence instance is a live target. Anyone running self-hosted Confluence Data Center or Server is exposed; note this does not affect Atlassian Cloud tenants.
Do this: Patch every Confluence Data Center and Server instance to a fixed version immediately, and restrict or take offline any unpatched instance exposed to the internet.
AI-generated from public data, 2026-07-23. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2023-22518
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2023-22518
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2023-11-28 (past due).
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2023-22518
The authoritative fix and affected-version list are published by the vendor. Find the Confluence Data Center and Server advisory on Atlassian Security Advisories.
Common questions about CVE-2023-22518
Is CVE-2023-22518 actively exploited?
Yes. CVE-2023-22518 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2023-11-07, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2023-22518?
CISA set the federal (BOD 22-01) remediation due date at 2023-11-28, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
What fixes CVE-2023-22518?
The authoritative fix is in the vendor advisory: see Atlassian Security Advisories for the patched Confluence Data Center and Server versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2023-22518?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2023-22518's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
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