Headline
CVE-2021-40128: Cisco Security Advisory: Cisco Webex Meetings Email Content Injection Vulnerability
A vulnerability in the account activation feature of Cisco Webex Meetings could allow an unauthenticated, remote attacker to send an account activation email with an activation link that points to an arbitrary domain. This vulnerability is due to insufficient validation of user-supplied parameters. An attacker could exploit this vulnerability by sending a crafted HTTP request to the account activation page of Cisco Webex Meetings. A successful exploit could allow the attacker to send to any recipient an account activation email that contains a tampered activation link, which could direct the user to an attacker-controlled website.
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Summary
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A vulnerability in the account activation feature of Cisco Webex Meetings could allow an unauthenticated, remote attacker to send an account activation email with an activation link that points to an arbitrary domain.
This vulnerability is due to insufficient validation of user-supplied parameters. An attacker could exploit this vulnerability by sending a crafted HTTP request to the account activation page of Cisco Webex Meetings. A successful exploit could allow the attacker to send to any recipient an account activation email that contains a tampered activation link, which could direct the user to an attacker-controlled website.
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-activation-3sdNFxcy
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Affected Products
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This vulnerability affects Cisco Webex Meetings, which is cloud based.
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.
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Workarounds
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- There are no workarounds that address this vulnerability.
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Fixed Software
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Cisco has addressed this vulnerability 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.
The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.
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Exploitation and Public Announcements
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- The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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Source
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- Cisco would like to thank the security researcher Prasenjit Kanti Paul for reporting this vulnerability.
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Cisco Security Vulnerability Policy
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- 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.
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URL
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Revision History
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Version
Description
Section
Status
Date
1.0
Initial public release.
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Final
2021-NOV-03
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Legal Disclaimer
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