Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wso2 | Api Manager | 2.6.0 |
| Wso2 | Identity Server | 5.7.0 |
Related Weaknesses (CWE)
References
- https://cybersecurityworks.com/zerodays/cve-2019-20437-wso2.htmlExploitThird Party Advisory
- https://docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635Vendor Advisory
- https://github.com/cybersecurityworks/Disclosed/issues/20ExploitThird Party Advisory
- https://cybersecurityworks.com/zerodays/cve-2019-20437-wso2.htmlExploitThird Party Advisory
- https://docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635Vendor Advisory
- https://github.com/cybersecurityworks/Disclosed/issues/20ExploitThird Party Advisory
FAQ
What is CVE-2019-20437?
CVE-2019-20437 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 ...
How severe is CVE-2019-20437?
CVE-2019-20437 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-20437?
Check the references section above for vendor advisories and patch information. Affected products include: Wso2 Api Manager, Wso2 Identity Server.