Sigma rule: CVE-2023-22518 Exploitation Attempt - Vulnerable Endpoint Connection (Webserver)

Rule

Title

CVE-2023-22518 Exploitation Attempt - Vulnerable Endpoint Connection (Webserver)

Status

test

Level

medium

Author

Andreas Braathen (mnemonic.io)

Date

2023-11-14

File

rules-emerging-threats/2023/Exploits/CVE-2023-22518/web_exploit_cve_2023_22518_confluence_auth_bypass.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects exploitation attempt of CVE-2023-22518 (Confluence Data Center / Confluence Server), where an attacker can exploit vulnerable endpoints to e.g. create admin accounts and execute arbitrary commands.

Log source

category

webserver

Detection

selection_method:
    cs-method: 'POST'
selection_uris:
    cs-uri-query|contains:
      # Exploitable endpoints
        - '/json/setup-restore-local.action'
        - '/json/setup-restore-progress.action'
        - '/json/setup-restore.action'
        - '/server-info.action'
        - '/setup/setupadministrator.action'
selection_status:
    # Response code may be indicative of exploitation success, but is not always the case
    sc-status:
        - 200
        - 302
        - 405
condition: all of selection_*

False positives (as the rule lists them)

• Vulnerability scanners

Tags

• attack.initial-access
• attack.t1190
• cve.2023-22518
• detection.emerging-threats

CVEs this rule names

• CVE-2023-22518

MITRE ATT&CK ids this rule names

• T1190

Related rules

• 27d2cdde-9778-490e-91ec-9bd0be6e8cc6 (similar)

References

• https://confluence.atlassian.com/security/cve-2023-22518-improper-authorization-vulnerability-in-confluence-data-center-and-server-1311473907.html
• https://www.huntress.com/blog/confluence-to-cerber-exploitation-of-cve-2023-22518-for-ransomware-deployment
• https://github.com/ForceFledgling/CVE-2023-22518

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2023/Exploits/CVE-2023-22518/web_exploit_cve_2023_22518_confluence_auth_bypass.yml