CVE-2023-22515

Atlassian Confluence Data Center and Server: Broken Access Control

As of , CVE-2023-22515 in Atlassian Confluence Data Center and Server is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 5 October 2023
US federal deadline
13 October 20238 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Known
EPSS score
0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.00 on 5 October 2023EPSS on the day CISA listed it.
Public exploit
2 Metasploit modules
Fix
Vendor advice: confluence.atlassian.comLinks below, from CISA's entry.

What CISA says to do

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.

CISA's required action

What the flaw is

Atlassian Confluence Data Center and Server contains a broken access control vulnerability that allows an attacker to create unauthorized Confluence administrator accounts and access Confluence.

CISA's description

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 CVE record's description, from atlassian

CVE published
4 October 2023
Assigned by
atlassian
CVSS
10.0 Critical (CVSS 3.0, from the CNA)
CWE-20
Improper Input Validation
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

Public exploits

Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.

  • Metasploit: Atlassian Confluence Unauthenticated Remote Code Executionexploit module, rank excellent
  • Metasploit: Atlassian Confluence Data Center and Server Authentication Bypass via Broken Access Controlauxiliary module, rank normal

Confluence Data Center and Server: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2023-22527Template InjectionAtlassian Confluence Data Center and ServerPatch this weekRansomware use; Metasploit module; EPSS 0.990.99
CVE-2023-22518Improper AuthorizationAtlassian Confluence Data Center and ServerPatch this weekRansomware use; Metasploit module; EPSS 0.990.99

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