CVE-2019-20437

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.

• CWE-79

• https://cybersecurityworks.com/zerodays/cve-2019-20437-wso2.htmlExploit, Third Party Advisory
• https://docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635Vendor Advisory
• https://github.com/cybersecurityworks/Disclosed/issues/20Exploit, Third Party Advisory
• https://cybersecurityworks.com/zerodays/cve-2019-20437-wso2.htmlExploit, Third Party Advisory
• https://docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635Vendor Advisory
• https://github.com/cybersecurityworks/Disclosed/issues/20Exploit, Third Party Advisory

Published

Jan 28, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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