CVE-2021-1221 Cisco Webex Meetings and Cisco Webex Meetings Server Software Hyperlink Injection Vulnerability
An authenticated attacker can inject malicious hyperlinks into meeting invitation emails, potentially tricking recipients into visiting attacker-controlled sites.
- 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-2021-1221?
CVE-2021-1221 is a medium-severity cross-site scripting vulnerability in Cisco Webex Meetings, published on 4 Feb 2021. 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 user interface of Cisco Webex Meetings and Cisco Webex Meetings Server Software could allow an authenticated, remote attacker to inject a hyperlink into a meeting invitation email. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by entering a URL into a field in the user interface. A successful exploit could allow the attacker to generate a Webex Meetings invitation email that contains a link to a destination of their choosing. Because this email is sent from a trusted source, the recipient may be more likely to click the link.
Which versions are affected by CVE-2021-1221?
It affects 2 products.
Products include Cisco Webex Meetings, Cisco Webex Meetings Server.
How do I fix CVE-2021-1221?
No fix has been published for CVE-2021-1221 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-2021-1221 being exploited?
There is no known exploitation of CVE-2021-1221 in the wild and no public exploit code.
Other vulnerabilities in Cisco Webex Meetings
- CVE-2017-12368 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
- CVE-2017-12369 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
- CVE-2017-12370 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
- CVE-2017-12371 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
- CVE-2017-12372 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
Sources
Also known as GHSA-9qvw-hfpr-cvx6.