CVE-2019-20104

Published: Feb 6, 2020Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

The OpenID client application in Atlassian Crowd before version 3.6.2, and from version 3.7.0 before 3.7.1 allows remote attackers to perform a Denial of Service attack via an XML Entity Expansion vulnerability.

Affected (7)

Products: Atlassian: Crowd

1 product

Configuration A

7 vulnerable

Vulnerable Software	Affected Versions
Atlassian Crowd	version < 3.2.11
Atlassian Crowd	3.3.0 ≤ version < 3.3.8
Atlassian Crowd	3.4.0 ≤ version < 3.4.7
Atlassian Crowd	3.5.0 ≤ version < 3.5.2
Atlassian Crowd	3.6.0 ≤ version < 3.6.2
Atlassian Crowd	3.6.3 ≤ version < 3.7.1
Atlassian Crowd	3.7.2 ≤ version < 4.0.0

Related CWEs

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.

References (4)

https://jira.atlassian.com/browse/CWD-5526

Source: security@atlassian.com

Vendor Advisory

https://zeroauth.ltd/blog/2020/02/07/cve-2019-20104-atlassian-crowd-openid-client-vulnerable-to-remote-dos-via-xml-entity-expansion/

Source: security@atlassian.com

ExploitTechnical Description

https://jira.atlassian.com/browse/CWD-5526

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://zeroauth.ltd/blog/2020/02/07/cve-2019-20104-atlassian-crowd-openid-client-vulnerable-to-remote-dos-via-xml-entity-expansion/

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitTechnical Description

Timeline

No history available yet.