Cisco Webex Meetings and Cisco Webex Meetings Server Software Hyperlink Injection Vulnerability
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco WebEx Meetings Server | all versions | — | No fix listed | CNA |
- Cisco WebEx Meetings Server VendorCisco Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:webex_meetings:*:*:*:*:*:*:*:* | before 41.1.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:webex_meetings_server:*:*:*:*:*:*:*:* | before 3.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:webex_meetings_server:3.0:-:*:*:*:*:*:* | 3.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:webex_meetings_server:3.0:maintenance_release3_security_patch4:*:*:*:*:*:* | 3.0 maintenance_release3_security_patch4 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:webex_meetings_server:4.0:-:*:*:*:*:*:* | 4.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:webex_meetings_server:4.0:maintenance_release3_security_patch3:*:*:*:*:*:* | 4.0 maintenance_release3_security_patch3 | Vulnerable | Cisco |
- cpe:2.3:a:cisco:webex_meetings:*:*:*:*:*:*:*:* Versions before 41.1.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:webex_meetings_server:*:*:*:*:*:*:*:* Versions before 3.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:webex_meetings_server:3.0:-:*:*:*:*:*:* Versions 3.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:webex_meetings_server:3.0:maintenance_release3_security_patch4:*:*:*:*:*:* Versions 3.0 maintenance_release3_security_patch4 Vulnerable ·Cisco
- cpe:2.3:a:cisco:webex_meetings_server:4.0:-:*:*:*:*:*:* Versions 4.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:webex_meetings_server:4.0:maintenance_release3_security_patch3:*:*:*:*:*:* Versions 4.0 maintenance_release3_security_patch3 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-1221
- 2026-10-03 Alias added: GHSA-9qvw-hfpr-cvx6
References
More Cisco Webex Meetings vulnerabilities
- TI-2019-01300 Cisco Webex Meetings Desktop App and Cisco Webex Productivity Tools Update Service Command Injection Vulnerability CVSS 3.0HIGH 8.8
- TI-2018-00079 Improper input validation in Cisco WebEx Advanced Recording Format Player CVSS 3.0CRITICAL 9.6
- TI-2018-00224 Improper input validation in Cisco WebEx Advanced Recording Format file players CVSS 3.0CRITICAL 9.6
- TI-2020-02913 Cisco Webex Meetings and Cisco Webex Meetings Server Token Handling Unauthorized Access Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2020-02894 Cisco Webex Meetings Desktop App for Mac Update Feature Code Execution Vulnerability CVSS 3.1HIGH 8.8
- TI-2017-09144 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players CVSS 3.0CRITICAL 9.6
Sources
- CVE-2021-1221 · CVE Program
- CVE-2021-1221 · NVD
- FIRST EPSS
- GHSA-9qvw-hfpr-cvx6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences