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    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:Feb 6, 2020
    Last Modified:Nov 21, 2024
    EPS:Feb 6, 2020
    EPSS Score:0.02432
    CVSS Score:7.5

    Affected Products

    Vendor
    Atlassian
    Product
    Crowd

    Exploits

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

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-197 Exponential Data Expansion

    Related CVEs

    CVE-2026-21569 (CVSS 7.9) — This High severity XXE (XML External Entity Injection) vulnerability was introduced in version 7.1.0 of Crowd …
    CVE-2023-22521 (CVSS 8.8) — This High severity RCE (Remote Code Execution) vulnerability was introduced in version 3.4.6 of Crowd Data Cen…
    CVE-2022-43782 (CVSS 9.8) — Affected versions of Atlassian Crowd allow an attacker to authenticate as the crowd application via security m…
    CVE-2022-26137 (CVSS 8.8) — A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to cause additional S…
    CVE-2022-26136 (CVSS 9.8) — A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to bypass Servlet Fil…
    CVE-2020-36240 (CVSS 5.3) — The ResourceDownloadRewriteRule class in Crowd before version 4.0.4, and from version 4.1.0 before 4.1.2 allow…
    CVE-2019-20902 (CVSS 7.5) — Upgrading Crowd via XML Data Transfer can reactivate a disabled user from OpenLDAP. The affected versions are …
    CVE-2017-18107 (CVSS 6.5) — Various resources in the Crowd Demo application of Atlassian Crowd before version 3.1.1 allow remote attackers…
    CVE-2019-15005 (CVSS 4.3) — The Atlassian Troubleshooting and Support Tools plugin prior to version 1.17.2 allows an unprivileged user to …
    CVE-2019-11580 (CVSS 9.8) — Atlassian Crowd and Crowd Data Center had the pdkinstall development plugin incorrectly enabled in release bui…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High