A vulnerability in client join services of Cisco Webex Meetings could allow an unauthenticated, remote attacker to manipulate cached HTTP responses within the meeting join service.
This vulnerability is due to improper handling of malicious HTTP requests to the affected service. An attacker could exploit this vulnerability by manipulating stored HTTP responses within the service, also known as HTTP cache poisoning. A successful exploit could allow the attacker to cause the Webex Meetings service to return incorrect HTTP responses to clients.
CVE ID: CVE-2025-20255
CVSS Base Severity: MEDIUM
CVSS Base Score: 4.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Vendor: Cisco
Product: Cisco Webex Meetings
EPSS Score: 0.02% (probability of being exploited)
EPSS Percentile: 3.56% (scored less or equal to compared to others)
EPSS Date: 2025-06-19 (when was this score calculated)