What’s Vulnerable › Vulnerabilities

CVE-2019-15987: Cisco WebEx Centers Username Enumeration Information Disclosure Vulnerability

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-11-26 · updated 2026-06-17
• Weakness: CWE-287

Description

A vulnerability in web interface of the Cisco Webex Event Center, Cisco Webex Meeting Center, Cisco Webex Support Center, and Cisco Webex Training Center could allow an unauthenticated, remote attacker to guess account usernames. The vulnerability is due to missing CAPTCHA protection in certain URLs. An attacker could exploit this vulnerability by sending a crafted request to the web interface. A successful exploit could allow the attacker to know if a given username is valid and find the real name of the user.

Affected products

• Cisco Webex Event Center: all versions
• Cisco WebEx Meeting Center: all versions
• Cisco WebEx WRF Player: 11.0.0
• Cisco WebEx Meetings Server: 4.0
• Cisco Webex Support Center: all versions
• Cisco Webex Training Center: all versions

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191120-webex-centers-infodis
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191120-webex-centers-infodis

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