Medium severity6.1NVD Advisory· Published Jan 28, 2020· Updated Jun 17, 2026
CVE-2019-20437
CVE-2019-20437
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.
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Affected products
1- WSO2/API Managerdescription
Patches
Vulnerability mechanics
References
3- cybersecurityworks.com/zerodays/cve-2019-20437-wso2.htmlnvdExploitThird Party Advisory
- github.com/cybersecurityworks/Disclosed/issues/20nvdExploitThird Party Advisory
- docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635nvdVendor Advisory
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