XXE in Atlassian Crowd
CVE-2019-20104
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.024 (84.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000
Affected products
- Atlassian Crowd — versions unspecified, 3.7.0, unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- jira.atlassian.com/browse/CWD-5526 (Vendor Advisory)
- zeroauth.ltd/blog/2020/02/07/cve-2019-20104-atlassian-crowd-openid-client-vulne… (Technical Description, Exploit)
Frequently asked questions
- What is CVE-2019-20104?
- CVE-2019-20104 is a high-severity vulnerability in Atlassian Crowd, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 7.5/10. Published 2020-02-06.
- How severe is CVE-2019-20104?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-20104 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.