CVE-2020-8191 Cross-site scripting in Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP

Medium 6.1 Published 10 Jul 2020 Updated 4 Aug 2024

Reflected Cross-Site Scripting in Citrix ADC and Gateway allows attackers to execute scripts in user sessions, requiring an upgrade to secure versions.

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-2020-8191?

CVE-2020-8191 is a medium-severity cross-site scripting vulnerability in Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP, published on 10 Jul 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

Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows reflected Cross Site Scripting (XSS).

Weakness: CWE-79

Which versions are affected by CVE-2020-8191?

It affects 4 products.

Products include Citrix Application Delivery Controller Firmware, Citrix Gateway Firmware, Citrix Netscaler Gateway Firmware, Citrix Sd-Wan Wanop.

How do I fix CVE-2020-8191?

No fix has been published for CVE-2020-8191 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-2020-8191 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-8191 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as GHSA-h686-q2xf-663f.