huntrule

Confluence CVE-2019-3398 Web Exploitation via Path Traversal Upload POST Request

Alert on Confluence POST /upload.action requests with query-based path traversal filename patterns consistent with CVE-2019-3398.

FreeReviewedSigma · Critical · v5
Category
webserver
Author
Florian Roth (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2020-05-26
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Initial Access

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule identifies likely exploitation attempts against Confluence using the CVE-2019-3398 pattern. It matches HTTP POST requests to /upload.action that include a filename value with directory traversal sequences (../../../../), consistent with an attacker attempting to write or place files outside the intended directory. Detection relies on webserver HTTP telemetry containing request method and URI query parameters.

Reporting behind it

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Confluence CVE-2019-3398 Web Exploitation via Path Traversal Upload POST Request
Pivot detection · T1190 · 9 related

Changelog

v5
  1. v5
    Candidate ingested via manual entry.2026-07-31
  2. v4
    Candidate ingested via manual entry.2026-07-31
  3. v3
    Candidate ingested via manual entry.2026-07-31
  4. v2
    Candidate ingested via manual entry.2026-07-31
  5. v1
    No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.