CVE-2021-34743

Cisco Webex Software Application Authorization Bypass Vulnerability

Severity Score

7.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the application integration feature of Cisco Webex Software could allow an unauthenticated, remote attacker to authorize an external application to integrate with and access a user's account without that user's express consent. This vulnerability is due to improper validation of cross-site request forgery (CSRF) tokens. An attacker could exploit this vulnerability by convincing a targeted user who is currently authenticated to Cisco Webex Software to follow a link designed to pass malicious input to the Cisco Webex Software application authorization interface. A successful exploit could allow the attacker to cause Cisco Webex Software to authorize an application on the user's behalf without the express consent of the user, possibly allowing external applications to read data from that user's profile.

Una vulnerabilidad en la funcionalidad application integration de Cisco Webex Software podría permitir a un atacante remoto no autenticado autorizar a una aplicación externa a integrarse y acceder a la cuenta de un usuario sin el consentimiento expreso de éste. Esta vulnerabilidad es debido a una comprobación inapropiada los tokens de tipo cross-site request forgery (CSRF). Un atacante podría explotar esta vulnerabilidad al convencer a un usuario objetivo que esté autenticado en el software Cisco Webex para que siga un enlace diseñado para pasar una entrada maliciosa a la interfaz de autorización de la aplicación del software Cisco Webex. Una explotación con éxito podría permitir al atacante causar que Cisco Webex Software autorice una aplicación en nombre del usuario sin el consentimiento expreso de éste, permitiendo posiblemente que aplicaciones externas lean datos del perfil de ese usuario

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-06-15 CVE Reserved
2021-10-21 CVE Published
2023-05-13 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-352: Cross-Site Request Forgery (CSRF)

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-2FmKd7T	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Webex Meetings Search vendor "Cisco" for product "Webex Meetings"				-		-		Affected