#VU50317 Input validation error in Cisco Webex Meetings and Cisco WebEx Meetings Server - CVE-2021-1221

Vulnerability identifier: #VU50317

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-1221

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Webex Meetings
Server applications / Conferencing, Collaboration and VoIP solutions
Cisco WebEx Meetings Server
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to inject a hyperlink into a meeting invitation email.

The vulnerability exists due to insufficient validation of user-supplied input in the user interface. A remote authenticated attacker can generate a Webex Meetings invitation email that contains a link to a destination of their choosing.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Webex Meetings: before 41.1.0.17621

Cisco WebEx Meetings Server: before 3.0MR3 Patch 5

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wbx-linkinj-WWZpVqu9

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.