CVE-2019-20436 Cross-site scripting in n/a

Medium 6.1 Published 27 Jan 2020 Updated 5 Aug 2024

Authenticated attackers can execute arbitrary scripts by configuring malicious claim dialect URIs in WSO2 Identity Server and API Manager.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2019-20436?

CVE-2019-20436 is a medium-severity cross-site scripting vulnerability in Wso2 Api Manager, published on 27 Jan 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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. If there is a claim dialect configured with an XSS payload in the dialect URI, and a user picks up this dialect's URI and adds it as the service provider claim dialect while configuring the service provider, that payload gets executed. The attacker also needs to have privileges to log in to the management console, and to add and configure claim dialects.

Weakness: CWE-79

Which versions are affected by CVE-2019-20436?

It affects 2 products.

Products include Wso2 Api Manager, Wso2 Identity Server.

How do I fix CVE-2019-20436?

No fix has been published for CVE-2019-20436 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2019-20436 being exploited?

There is no known exploitation of CVE-2019-20436 in the wild and no public exploit code.

All Wso2 Api Manager vulnerabilities

Sources

Also known as GHSA-w83r-49rg-9jfv.