CVE-2023-22515
Atlassian — Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
Atlassian · CWE-20 — Improper input validation · in CISA KEV since 2023-10-05
EVRS 94 of 100 Immediate
Out-of-Band / Urgent Remediation
Rank 67 of 2,960 tracked
Why it scores 94
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and associated with known ransomware campaigns.
- CISA KEVApplied
- RansomwareApplied
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
- confluence.atlassian.com/…/cve-2023-22515-privilege-escalation-vulnerability-in-confluence-data-center-and-server-1295682276.html
- nvd.nist.gov/…/CVE-2023-22515
Fixed in
confluence data center: update to 8.3.3 or later | confluence data center: update to 8.4.3 or later | confluence data center: update to 8.5.2 or later | confluence server: update to 8.3.3 or later | confluence server: update to 8.4.3 or later | confluence server: update to 8.5.2 or later
Affected versions
- confluence data center
>= 8.0.0 < 8.3.3>= 8.4.0 < 8.4.3>= 8.5.0 < 8.5.2 - confluence server
>= 8.0.0 < 8.3.3>= 8.4.0 < 8.4.3>= 8.5.0 < 8.5.2
Remediation
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check all affected Confluence instances for evidence of compromise per vendor instructions and report any positive findings to CISA.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 9.8 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.992 (99.94th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Known | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2023-10-13 · KEV since 2023 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | Public module exists | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 10.0 (v3.0), assigned by atlassian. | Listed | ENISA EUVD |
Description
NVDAtlassian 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.
What CISA says to do
- confluence.atlassian.com/…/cve-2023-22515-privilege-escalation-vulnerability-in-confluence-data-center-and-server-1295682276.html
- nvd.nist.gov/…/CVE-2023-22515
Public module
Metasploit lists the best-ranked (excellent) of 2 public modules for this CVE: Atlassian Confluence Unauthenticated Remote Code Execution (multi/http/atlassian_confluence_rce_cve_2023_22515). A module existing is not the same as active exploitation; see metasploit.com.