CVE-2023-20133 Cross-site scripting in Cisco Webex Meetings

Medium 5.4 Published 7 Jul 2023 Updated 23 Oct 2024

Authenticated attackers can inject malicious scripts into Webex Meetings interfaces, potentially executing code or stealing browser data from victims.

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-2023-20133?

CVE-2023-20133 is a medium-severity cross-site scripting vulnerability in Cisco Webex Meetings, published on 7 Jul 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A vulnerability in the web interface of Cisco Webex Meetings could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because of insufficient validation of user-supplied input in Webex Events (classic) programs, email templates, and survey questions. An attacker could exploit this vulnerability by persuading a user to click a malicious link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

Weakness: CWE-79

Which versions are affected by CVE-2023-20133?

It affects 1 product.

Products include Cisco Webex Meetings.

How do I fix CVE-2023-20133?

No fix has been published for CVE-2023-20133 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-2023-20133 being exploited?

There is no known exploitation of CVE-2023-20133 in the wild and no public exploit code.

All Cisco Webex Meetings vulnerabilities

Sources

Also known as GHSA-rcq7-jcwj-8f59.