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CVE-2021-37843 Details

Description

The resolution SAML SSO apps for Atlassian products allow a remote attacker to login to a user account when only the username is known (i.e., no other authentication is provided). The fixed versions are for Jira: 3.6.6.1, 4.0.12, 5.0.5; for Confluence 3.6.6, 4.0.12, 5.0.5; for Bitbucket 2.5.9, 3.6.6, 4.0.12, 5.0.5; for Bamboo 2.5.9, 3.6.6, 4.0.12, 5.0.5; and for Fisheye 2.5.9.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://wiki.resolution.de/doc/saml-sso/5.0.x/all/security-advisories/2021-07-29-authentication-bypass-network-attacker-can-login-to-users-accounts-when-usernames-are-known	CVE	Third Party Advisory
https://wiki.resolution.de/doc/saml-sso/5.0.x/all/security-advisories/2021-07-29-authentication-bypass-network-attacker-can-login-to-users-accounts-when-usernames-are-known	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-306	Missing Authentication for Critical Function	[email protected]

Affected Products

Product	Versions
atlassian saml single sign on	< 2.5.9 < 3.5.6 < 3.6.6.1 >= 3.0.0, < 3.6.6 >= 3.6.0, < 3.6.6.1
CPE cpe:2.3:a:atlassian:saml_single_sign_on::::::bamboo::* cpe:2.3:a:atlassian:saml_single_sign_on::::::bitbucket::* cpe:2.3:a:atlassian:saml_single_sign_on::::::fisheye::* cpe:2.3:a:atlassian:saml_single_sign_on::::::confluence::* cpe:2.3:a:atlassian:saml_single_sign_on::::::jira::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Aug 11, 2021	Initial Analysis	[email protected]