Home/CVE/Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
CVE

CVE-2023-22515

Atlassian Confluence Data Center and Server Broken Access Control Vulnerability

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.

CRITICAL · CVSS 9.8 ⚠ CISA KEV EPSS 0.94326 Ransomware: known
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • Linked to known ransomware campaigns
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 0% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules10 YARA rules0
⬢

Required 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.

◆

Threat Actors Linked

2
actorAPT40
actorTrigona
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

6
atlassian confluence data center>= 8.0.0 and < 8.3.3
atlassian confluence data center>= 8.4.0 and < 8.4.3
atlassian confluence data center>= 8.5.0 and < 8.5.2
atlassian confluence server>= 8.0.0 and < 8.3.3
atlassian confluence server>= 8.4.0 and < 8.4.3
atlassian confluence server>= 8.5.0 and < 8.5.2
⚠

Public Exploits & PoCs

2
nucleiAtlassian Confluence - Privilege Escalationcritical
pocpacketstormsecurity.com · Atlassian-Confluence-Unauthenticated-Remote-Code-Executio...packetstormsecurity.com
◈

Detection Rules (IDS/IPS)

6
et-openET WEB_SPECIFIC_APPS Atlassian Confluence CVE-2023-22515 Step 1/2 Attemptattempted-recon
et-openET WEB_SPECIFIC_APPS Atlassian Confluence CVE-2023-22515 Step 2/2 Attemptattempted-admin
et-openET WEB_SPECIFIC_APPS Atlassian Confluence CVE-2023-22515 Step 1/2 Successsuccessful-admin
et-openET WEB_SPECIFIC_APPS Atlassian Confluence CVE-2023-22515 Step 2/2 Successsuccessful-admin
et-openET WEB_SPECIFIC_APPS Atlassian Confluence CVE-2023-22515 Vulnerable Server Detected M1web-application-activity
et-openET WEB_SPECIFIC_APPS Atlassian Confluence CVE-2023-22515 Vulnerable Server Detected M2web-application-activity
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
◈

Sigma Hunt Rules

10
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
relatedcriticalAntivirus Password Dumper Detection
relatedcriticalHacktool Execution - Imphash
relatedcriticalHackTool - Rubeus Execution
relatedcriticalPotential Credential Dumping Via LSASS Process Clone
relatedcriticalWCE wceaux.dll Access
relatedcriticalHackTool - Dumpert Process Dumper Default File
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · security@atlassian.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Oct 2023 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

5
cisaKEV-CVE-2023-22515
splunk-security-contentaa9d80d9-ed47-44da-aceb-2909ca4dc19e
splunk-security-content630ea8b2-2800-4f5d-9cbc-d65c567349b0
splunk-security-content115bebac-0976-4f7d-a3ec-d1fb45a39a11
splunk-security-contentc2a332c3-24a2-4e24-9455-0e80332e6746
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515Vendor Advisory
https://confluence.atlassian.com/pages/viewpage.action?pageId=1295682276Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-92475Issue TrackingVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22515US Government Resource
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