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Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2019-11580

Crowd Remote Code Execution

Atlassian / Crowd · affected before unspecified

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Severity: CVSS 9.8 · Critical
Confidence: Confirmed
Exploit status: Exploited in the wild
EPSS: 95.4%
First observed: —
Last observed: —

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2019-11580 is an unauthenticated vulnerability affecting Atlassian Crowd. Atlassian Crowd and Crowd Data Center had the pdkinstall development plugin incorrectly enabled in release builds. Attackers who can send...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Atlassian / Crowd affected before unspecified.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Atlassian Crowd and Crowd Data Center had the pdkinstall development plugin incorrectly enabled in release builds

Atlassian Crowd and Crowd Data Center had the pdkinstall development plugin incorrectly enabled in release builds. Attackers who can send unauthenticated or authenticated requests to a Crowd or Crowd Data Center instance can exploit this vulnerability to install arbitrary plugins, which permits remote code execution on systems running a vulnerable version of Crowd or Crowd Data Center.

All versions of Crowd from version 2.1.0 before 3.0.5 (the fixed version for 3.0.x), from version 3.1.0 before 3.1.6 (the fixed version for 3.1.x), from version 3.2.0 before 3.2.8 (the fixed version for 3.2.x), from version 3.3.0 before 3.3.5 (the fixed version for 3.3.x), and from version 3.4.0 before 3.4.4 (the fixed version for 3.4.x) are affected by this vulnerability.

Vendor Product Affected Status

Atlassian Crowd Before unspecified Affected

Atlassian Crowd Before 3.0.5 Affected

Atlassian Crowd Before unspecified Affected

Atlassian Crowd Before 3.1.6 Affected

Atlassian Crowd Before unspecified Affected

Atlassian Crowd Before 3.2.8 Affected

Atlassian Crowd Before unspecified Affected

Atlassian Crowd Before 3.3.5 Affected

Atlassian Crowd Before unspecified Affected

Atlassian Crowd Before 3.4.4 Affected

Published: 03 Jun 2019
Exploitation Reported: 03 Nov 2021
Attack vector: Remote
Complexity: Low
Privileges: None
User interaction: None

Tags

cisa metasploit nuclei_scanner malware

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2019-11580
108637 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/108637
jira.atlassian.com/browse/CWD-5388 jira.atlassian.com · CVE Record https://jira.atlassian.com/browse/CWD-5388
packetstormsecurity.com/files/163810/Atlassian-Crowd-pdkinstall-Remo... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/163810/Atlassian-Crowd-pdkinstal...

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 03 Nov 2021

Independent exploitation attestation added to the KEV Intelligence record.

Used in malware

CISA

Recorded 02 Jun 2026

Malware families have been linked to exploitation of this CVE.

Proof of concept available

GitHub

Recorded 17 Jul 2019

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source	Added
CISA First	2021-11-03 00:00 UTC
The Shadowserver	2026-06-05 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 0
User-Agents: 0

Raw values available in Pro and Enterprise.

Scanner coverage

Metasploit template detected 28 Apr 2025.

View Metasploit template

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner	Reference	Detected
Metasploit	https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/atlassian_crowd_pdkinstall_plugin_upload_rce.rb	28 Apr 2025
Nuclei	https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2019/CVE-2019-11580.yaml	25 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

95.4%

All CVSS Scores

CVSS v3.1 9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 7.5 High

AV:N/AC:L/Au:N/C:P/I:P/A:P

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Atlassian Crowd and Crowd Data Center - Unauthenticated Remote Code Execution

nuclei · Created Unknown

atlassian_crowd_pdkinstall_plugin_upload_rce

metasploit · Created Unknown

Metasploit module for CVE-2019-11580

Timeline

From disclosure to observed exploitation

05 Jun 2026
KEV confirmed by The Shadowserver

Exploitation attested by an external source
02 Jun 2026
First public exploitation report

Exploit observed in malware
28 Apr 2025
Metasploit module available

Exploit module available
28 Apr 2025
Public PoC available

Public proof-of-concept code published
25 Apr 2025
Nuclei template available

Scanner coverage available
03 Nov 2021
Added to CISA KEV

Listed in the CISA Known Exploited Vulnerabilities catalog
03 Jun 2019
CVE published

Vulnerability disclosed publicly
29 Apr 2019
CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2019-11580

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2019-11580",
  "confidence": "Confirmed",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.95355,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

Early warning alerts

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