CVE-2019-20104 XML external entity in Crowd

What is CVE-2019-20104?

CVE-2019-20104 is a high-severity vulnerability in Atlassian Crowd, published on 6 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-776

Which versions are affected by CVE-2019-20104?

It affects 1 product.

Products include Atlassian Crowd.

How do I fix CVE-2019-20104?

No fix has been published for CVE-2019-20104 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-20104 being exploited?

There is no known exploitation of CVE-2019-20104 in the wild and no public exploit code.

Other vulnerabilities in Atlassian Crowd

• CVE-2019-11580 Atlassian Crowd and Crowd Data Center Remote Code Execution Exploited Critical 9.8
• CVE-2022-43782 Auth bypass in Crowd Data Center Critical 9.8
• CVE-2016-6496 Deserialization in n/a Critical 9.8
• CVE-2017-18105 Auth bypass in Crowd High 8.1
• CVE-2018-20238 Auth bypass in Crowd High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-g2rw-3cc4-qq38.