Threats / Atlassian / CVE-2019-11580
CVE-2019-11580
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Atlassian Crowd and Data Center vulnerability
Atlassian Crowd and Crowd Data Center contain a remote code execution vulnerability due to a development plugin (pdkinstall) being incorrectly enabled in production builds.
Verdict
Today item, not a backlog item.
An unauthenticated attacker can execute arbitrary code on affected Crowd instances. The vulnerability has been actively exploited in ransomware campaigns and carries a high exploitation probability (EPSS 0.94).
CISA KEV Yes · 2021-11-033Ransomware use Flagged3EPSS 0.95355 (verify live)4Exploit Weaponized · public PoC5
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
669 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.95355 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Atlassian, Crowd and Crowd Data Center. Confirm exact fixed builds in the vendor advisory.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I identify that the pdkinstall plugin is enabled and accessible without authentication.
Business
Attackers gain a direct path to remote code execution on identity and access management infrastructure.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I invoke the development plugin to execute arbitrary commands on the server.
Business
Complete compromise of the Crowd instance and potential lateral movement to dependent systems.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish persistence and deploy ransomware or data exfiltration payloads.
Business
Operational shutdown, data breach, and ransom demands affecting all systems relying on Crowd for authentication.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05