CVE-2022-21826 Cross-site scripting in Pulse Connect Secure VPN Server

Medium 5.4 Published 30 Sep 2022 Updated 3 Aug 2024

Attacker can exploit HTTP request smuggling to inject malicious scripts, leading to XSS and potential account takeover in Pulse Secure VPN.

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

What is CVE-2022-21826?

CVE-2022-21826 is a medium-severity cross-site scripting vulnerability in Ivanti Connect Secure, published on 30 Sep 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Pulse Secure version 9.115 and below may be susceptible to client-side http request smuggling, When the application receives a POST request, it ignores the request's Content-Length header and leaves the POST body on the TCP/TLS socket. This body ends up prefixing the next HTTP request sent down that connection, this means when someone loads website attacker may be able to make browser issue a POST to the application, enabling XSS.

Weakness: CWE-444

Which versions are affected by CVE-2022-21826?

It affects 2 products.

Products include Ivanti Connect Secure, Pulsesecure Pulse Connect Secure.

How do I fix CVE-2022-21826?

No fix has been published for CVE-2022-21826 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-2022-21826 being exploited?

There is no known exploitation of CVE-2022-21826 in the wild and no public exploit code.

All Ivanti Connect Secure vulnerabilities

Sources

Also known as GHSA-w594-hmpv-qhh5.