CVE-2018-0390 Cross-site scripting in Cisco Webex unknown

Medium 6.1 Published 18 Jul 2018 Updated 29 Nov 2024

Unauthenticated remote attackers can execute arbitrary scripts in users' browsers via DOM-based XSS in Cisco Webex due to insufficient input validation.

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-2018-0390?

CVE-2018-0390 is a medium-severity cross-site scripting vulnerability in Cisco Webex Meetings, published on 18 Jul 2018. 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

A vulnerability in the web framework of Cisco Webex could allow an unauthenticated, remote attacker to conduct a Document Object Model-based (DOM-based) cross-site scripting (XSS) attack against the user of the web interface of an affected system. The vulnerability is due to insufficient input validation of certain parameters that are passed to the affected software by using the HTTP POST method. An attacker who can submit malicious scripts to the affected user interface element could execute arbitrary script or HTML code in the user's browser in the context of the affected site. Cisco Bug IDs: CSCvj33287.

Weakness: CWE-79

Which versions are affected by CVE-2018-0390?

It affects 1 product.

Products include Cisco Webex Meetings.

How do I fix CVE-2018-0390?

No fix has been published for CVE-2018-0390 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-2018-0390 being exploited?

There is no known exploitation of CVE-2018-0390 in the wild and no public exploit code.

All Cisco Webex Meetings vulnerabilities

Sources

Also known as GHSA-8f39-mj7w-xj8h.