# CVE-2023-22515 — Atlassian Confluence Data Center **CISA KEV** · **Ransomware** > As of 2026-03-25, CVE-2023-22515 is a CRITICAL-severity vulnerability in Atlassian Confluence Data Center, CVSS v3.1 10, EPSS 99.2% (99.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-10-05), with a US federal remediation deadline of 2023-10-13, and CISA links it to known ransomware campaigns. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2023-22515, most recently “F5 BIG-IP Edge Appliance Abused for SSH Pivot → Confluence RCE → CVE-2025-33073 Kerberos Relay to Active Directory (Microsoft Defender Research)”. **Last updated:** 2026-03-25 ## What is CVE-2023-22515? Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknown vulnerability in publicly accessible Confluence Data Center and Server instances to create unauthorized Confluence administrator accounts and access Confluence instances. 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. The record classifies CVE-2023-22515 under weakness class [CWE-20](https://intel.threadlinqs.com/cwe/CWE-20). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1102 days ago. ## Severity and exploitation probability - **CVSS v3.1 base score:** 10 — CRITICAL (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`) - **EPSS (FIRST):** 99.2% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs - **CISA KEV:** Listed since 2023-10-05, federal remediation deadline 2023-10-13 — used in known ransomware campaigns - **Threadlinqs priority:** 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum - **Published:** 2023-10-04, last modified 2026-03-25 ## Is CVE-2023-22515 being exploited? CISA added CVE-2023-22515 to the Known Exploited Vulnerabilities catalog on 2023-10-05, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2023-10-13 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2023-22515 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (`http/cves/2023/CVE-2023-22515.yaml`). It currently carries a trending score of 50 in the Threadlinqs vulnerability feed. - [Chocapikk/CVE-2023-22515](https://github.com/Chocapikk/CVE-2023-22515) (github) - [ad-calcium/CVE-2023-22515](https://github.com/ad-calcium/CVE-2023-22515) (github) - [ErikWynter/CVE-2023-22515-Scan](https://github.com/ErikWynter/CVE-2023-22515-Scan) (github) - [AIex-3/confluence-hack](https://github.com/AIex-3/confluence-hack) (github) - [s1incere/CVE-2023-22515](https://github.com/s1incere/CVE-2023-22515) (github) - [aaaademo/Confluence-EvilJar](https://github.com/aaaademo/Confluence-EvilJar) (github) - [youcannotseemeagain/CVE-2023-22515_RCE](https://github.com/youcannotseemeagain/CVE-2023-22515_RCE) (github) - [j3seer/CVE-2023-22515-POC](https://github.com/j3seer/CVE-2023-22515-POC) (github) ## Affected products and versions - [Atlassian](https://intel.threadlinqs.com/vendors/atlassian): Confluence Data Center, Confluence Server ## How to fix CVE-2023-22515 Vendor advisory: [https://confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515](https://confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515). Because CVE-2023-22515 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2023-10-13. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory. ## Threat activity tracking CVE-2023-22515 1 tracked threat in the Threadlinqs corpus references CVE-2023-22515, either in the campaign’s CVE list or as an indicator on the campaign record. - [F5 BIG-IP Edge Appliance Abused for SSH Pivot → Confluence RCE → CVE-2025-33073 Kerberos Relay to Active Directory (Microsoft Defender Research)](https://intel.threadlinqs.com/threat/TL-2026-0572) — HIGH · 2026-05-23 ## Sources Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD. **Other references** - [packetstormsecurity.com](http://packetstormsecurity.com/files/175225/Atlassian-Confluence-Unauthenticated-Remote-Code-Execution.html) - [confluence.atlassian.com](https://confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515) - [confluence.atlassian.com (viewpage.action)](https://confluence.atlassian.com/pages/viewpage.action?pageId=1295682276) - [jira.atlassian.com](https://jira.atlassian.com/browse/CONFSERVER-92475) Canonical: https://intel.threadlinqs.com/cve/CVE-2023-22515 Full detection coverage and IOCs for threats exploiting CVE-2023-22515 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp