CVE-2019-20104 json
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 perfo…
published 6y ago modified 4mo ago also EUVD-2019-10660
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.4%
- EPSS 2.4% chance of exploitation in 30 days, percentile 84%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Atlassian Crowd 3.6.2, 3.7.1
Is CVE-2019-20104 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
2.43% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- zeroauth.ltd https://zeroauth.ltd/blog/2020/02/07/cve-2019-20104-atlassian-crowd-openid-client-vulnerable-to-remote-dos-via-xml-entity-expansion/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- Atlassian Crowd
Classification
- Weakness
-
- CWE-776 Improper Restriction of Recursive Entity References in DTDs
References
-
zeroauth.ltd
/blog/2020/02/07/cve-2019-20104-atlassian-crowd-openid-client-vulnerable-to-remote-dos-via-xml-entity-expansio
exploit, technical-description
-
jira.atlassian.com
/browse/CWD-5526
vendor-advisory
Sources
- CVE List CVE-2019-20104
- NVD CVE-2019-20104
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