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CVE-2019-20437 Details

Description

An issue was discovered in WSO2 API Manager 2.6.0, WSO2 IS as Key Manager 5.7.0, and WSO2 Identity Server 5.8.0. When a custom claim dialect with an XSS payload is configured in the identity provider basic claim configuration, that payload gets executed, if a user picks up that dialect's URI as the provisioning claim in the advanced claim configuration of the same Identity Provider. The attacker also needs to have privileges to log in to the management console, and to add and update identity provider configurations.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CNA: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://cybersecurityworks.com/zerodays/cve-2019-20437-wso2.html	CVE	ExploitThird Party Advisory
https://docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635	CVE	Vendor Advisory
https://github.com/cybersecurityworks/Disclosed/issues/20	CVE	ExploitThird Party Advisory
https://cybersecurityworks.com/zerodays/cve-2019-20437-wso2.html	[email protected]	ExploitThird Party Advisory
https://docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635	[email protected]	Vendor Advisory
https://github.com/cybersecurityworks/Disclosed/issues/20	[email protected]	ExploitThird Party Advisory

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
wso2 api manager	2.6.0
CPE cpe:2.3:a:wso2:api_manager:2.6.0:::::::* Remediation No remediation found in references.
wso2 identity server	5.7.0 5.8.0
CPE cpe:2.3:a:wso2:identity_server:5.7.0:::::::* cpe:2.3:a:wso2:identity_server:5.8.0:::::::* Remediation No remediation found in references.

Change History

6 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]
Nov 10, 2022	Modified Analysis	[email protected]
Oct 29, 2020	CVE Modified	[email protected]
Jan 28, 2020	Initial Analysis	[email protected]