Hyperlink Injection in Cisco Webex Meetings and Cisco Webex Meetings Server
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-1221 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| 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 |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Input validation error
EUVDB-ID: #VU50317
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 - Improper input validation
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco Webex Meetings: before 41.1.0.17621
Cisco WebEx Meetings Server: before 3.0MR3 Patch 5
CPE2.3- cpe:2.3:a:cisco_systems:cisco_webex_meetings:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_webex_meetings_server:*:*:*:*:*:*:*:*
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wbx-linkinj-WWZpVqu9
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.
