CVE-2019-20437

Public Exploit

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.10% Top 25%
Vendor Advisory wso2.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://docs.wso2.com/display/Security/Security+Advisory+WSO2-2019-0635 vendor advisory
https://github.com/cybersecurityworks/Disclosed/issues/20 third party advisory exploit
https://cybersecurityworks.com/zerodays/cve-2019-20437-wso2.html third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2019-20437?
CVE-2019-20437 has been scored as a medium severity vulnerability.
How to fix CVE-2019-20437?
To fix CVE-2019-20437, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-20437 being actively exploited in the wild?
It is possible that CVE-2019-20437 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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