Cisco Webex Meetings on cross site scriting

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CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k1.05

A vulnerability was found in Cisco Webex Meetings (Unified Communication Software) (the affected version is unknown). It has been declared as problematic. This vulnerability affects some unknown functionality. The manipulation of the argument on with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-80. As an impact it is known to affect integrity. An attacker might be able to inject arbitrary html and script code into the web site. This would alter the appearance and would make it possible to initiate further attacks against site visitors. CVE summarizes:

A vulnerability in certain web pages of Cisco Webex Meetings could allow an unauthenticated, remote attacker to modify a web page in the context of a user's browser. The vulnerability is due to improper checks on parameter values in affected pages. An attacker could exploit this vulnerability by persuading a user to follow a crafted link that is designed to pass HTML code into an affected parameter. A successful exploit could allow the attacker to alter the contents of a web page to redirect the user to potentially malicious websites, or the attacker could use this vulnerability to conduct further client-side attacks.

The weakness was released 04/08/2021 as cisco-sa-webex-VObwRKWV. The advisory is shared for download at tools.cisco.com. This vulnerability was named CVE-2021-1420 since 11/13/2020. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/11/2021). The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading eliminates this vulnerability.

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CVSSv3infoedit

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Cross site scripting
CWE: CWE-80
ATT&CK: T1059.007

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

11/13/2020 CVE assigned
04/08/2021 +145 days Advisory disclosed
04/08/2021 +0 days VulDB entry created
04/11/2021 +3 days VulDB last update

Sourcesinfoedit

Vendor: https://www.cisco.com/

Advisory: cisco-sa-webex-VObwRKWV
Status: Confirmed

CVE: CVE-2021-1420 (🔒)

Entryinfoedit

Created: 04/08/2021 10:44 AM
Updated: 04/11/2021 08:27 PM
Changes: (1) source_cve_cna
Complete: 🔍

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