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AUSCERT External Security Bulletin Redistribution
ESB-2020.4097
Cisco Webex Meetings API Cross-Site Scripting Vulnerability
19 November 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Meetings API
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-27126
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-meetings-xss-MX56prER
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Cisco Webex Meetings API Cross-Site Scripting Vulnerability
Priority: Medium
Advisory ID: cisco-sa-webex-meetings-xss-MX56prER
First Published: 2020 November 18 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvv71991
CVE Names: CVE-2020-27126
CWEs: CWE-80
Summary
o A vulnerability in an API of Cisco Webex Meetings could allow an
unauthenticated, remote attacker to conduct cross-site scripting attacks.
The vulnerability is due to improper validation of user-supplied input to
an application programmatic interface (API) within Cisco Webex Meetings. An
attacker could exploit this vulnerability by convincing a targeted user to
follow a link designed to submit malicious input to the API used by Cisco
Webex Meetings. A successful exploit could allow the attacker to conduct
cross-site scripting attacks and potentially gain access to sensitive
browser-based information from the system of a targeted user.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-webex-meetings-xss-MX56prER
Affected Products
o Vulnerable Products
This vulnerability affects 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 this vulnerability.
Cisco has confirmed that this vulnerability does not affect Cisco Webex
Meetings Server.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o Cisco has addressed this vulnerability in Cisco Webex Meetings, which is
cloud based. No user action is required. Customers can determine the
current remediation status or software version by using the Help function
in the service GUI.
Customers who need additional information are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance
providers.
Exploitation and Public Announcements
o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements or malicious use of the vulnerability that is
described in this advisory.
Source
o Cisco would like to thank Shwetabh Vishnoi for reporting this
vulnerability.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy . This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
Related to This Advisory
o Cross-Site Scripting
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-webex-meetings-xss-MX56prER
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-NOV-18 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
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