Summary

• Multiple vulnerabilities in the web interface of Cisco Webex Meetings could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack or upload arbitrary files as recordings.

  For more information about these vulnerabilities, see the Details section of this advisory.

  Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

  This advisory is available at the following link:
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wbx-sxss-fupl-64uHbcm5

Affected Products

• Vulnerable Products

  These vulnerabilities affect Cisco Webex Meetings, which is cloud based.

  Products Confirmed Not Vulnerable

  Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities.

Details

• The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit another vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerabilities.

  Details about the vulnerabilities are as follows:

  CVE-2023-20132: Cisco Webex Meetings Stored Cross-Site Scripting Vulnerability

  A vulnerability in the web interface of Cisco Webex Meetings could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface.

  This vulnerability exists because the web interface does not properly validate user-supplied input during a webinar event practice session. An attacker could exploit this vulnerability by persuading a user to click a malicious link during the session. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCwe38541
  CVE ID: CVE-2023-20132
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 5.4
  CVSS Vector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

  CVE-2023-20134: Cisco Webex Meetings File Upload Vulnerability

  A vulnerability in Cisco Webex Meetings could allow an authenticated, remote attacker to upload arbitrary files as recordings.

  This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTML request to an affected device. A successful exploit could allow the attacker to upload arbitrary files to Cisco Webex Meetings as recordings.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCwe38537
  CVE ID: CVE-2023-20134
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 4.3
  CVSS Vector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Workarounds

• There are no workarounds that address these vulnerabilities.

Fixed Software

• Cisco has addressed these vulnerabilities in Cisco Webex Meetings, which is cloud based. No user action is required.

  Customers who need additional information are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.

Exploitation and Public Announcements

• The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

Source

• Cisco would like to thank the external researcher who reported these vulnerabilities.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wbx-sxss-fupl-64uHbcm5

Revision History

• Version	Description	Section	Status	Date
  1.0	Initial public release.	-	Final	2023-APR-05

  Show Less