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PatchSiren cyber security CVE debrief

CVE-2019-11580 Atlassian CVE debrief

CVE-2019-11580 is a publicly cataloged Atlassian Crowd and Crowd Data Center remote code execution issue that CISA added to the Known Exploited Vulnerabilities catalog. Because CISA also marks it as associated with known ransomware campaign use, defenders should treat remediation as urgent. The supplied corpus does not include the underlying flaw details or affected-version range, so the safest response is to follow Atlassian’s update guidance and use the official CVE, NVD, and CISA records for validation.

Vendor
Atlassian
Product
Crowd and Crowd Data Center
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Administrators and security teams responsible for Atlassian Crowd and Crowd Data Center, plus vulnerability management, incident response, and ransomware preparedness teams.

Technical summary

The available source corpus identifies the issue only at a high level: Atlassian Crowd and Crowd Data Center are affected by a remote code execution vulnerability. CISA lists the CVE in its Known Exploited Vulnerabilities catalog and records known ransomware campaign use. No additional technical root-cause, exploit path, or version-specific details are provided in the supplied sources, so defenders should rely on vendor remediation instructions and official vulnerability records.

Defensive priority

High — this CVE is in CISA’s Known Exploited Vulnerabilities catalog and is marked as having known ransomware campaign use, which makes timely patching and exposure review a priority.

Recommended defensive actions

  • Apply updates per Atlassian’s vendor instructions as soon as possible.
  • Inventory all Atlassian Crowd and Crowd Data Center instances, including internal deployments and non-production systems.
  • Verify whether any instance is exposed to untrusted networks and restrict access where possible until patched.
  • Check security monitoring for signs of unauthorized code execution, suspicious process launches, or unexpected configuration changes on affected systems.
  • Confirm backup integrity and incident-response readiness in case the vulnerability has already been abused.
  • Track remediation status against the CISA KEV due date and close out any overdue assets immediately.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and official records linked in the corpus. The source item identifies Atlassian Crowd and Crowd Data Center as the affected product, classifies the issue as a remote code execution vulnerability, and notes known ransomware campaign use. The corpus does not include exploit details, affected versions, or vendor advisory text, so no additional technical claims are made.

Official resources

Publicly disclosed CVE with CISA KEV listing. Use the CVE published date from the supplied record (2021-11-03) for timeline context; do not infer issue timing from generation or review time.