A vulnerability in the custom URL parser of Cisco Webex App could allow an unauthenticated, remote attacker to persuade a user to download arbitrary files, which could allow the attacker to execute arbitrary commands on the host of the targeted user. This vulnerability is due to insufficient input validation when Cisco Webex App processes a meeting invite link. An attacker could exploit this vulnerability by persuading a user to click a crafted meeting invite link and download arbitrary files. A successful exploit could allow the attacker to execute arbitrary commands with the privileges of the targeted user.
With a CVSS score of 8.8, this vulnerability is classified as high severity. The risk to organizations includes potential unauthorized access and command execution, which could lead to data breaches or system compromise. The urgency for defenders is high, and organizations should prioritize patching immediately.
Currently, no public exploit exists, and it is not listed in the KEV catalog. However, the exploitability is assessed as high, necessitating immediate attention from security teams to mitigate risks.
The Cisco Webex Teams application is affected, specifically versions 44.6 and 44.7. Organizations utilizing these versions must ensure they are aware of this vulnerability and take appropriate action.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
In summary, organizations should take proactive measures to address this vulnerability, ensuring that systems are updated and security best practices are enforced to prevent potential exploitation.
The following details provide more insights into the vulnerability.
Vulnerability Details
A vulnerability in the custom URL parser of Cisco Webex App could allow an unauthenticated, remote attacker to persuade a user to download arbitrary files, which could allow the attacker to execute arbitrary commands on the host of the targeted user. This vulnerability is due to insufficient input validation when Cisco Webex App processes a meeting invite link.
The CVSS score for this vulnerability is 8.8, indicating it is of high severity. The affected product is Cisco Webex Teams, and it impacts versions 44.6 and 44.7.
The vulnerability was published on April 16, 2025, and is classified under CWE-829.
Technical Analysis
The root cause of this vulnerability lies in insufficient input validation within the custom URL parser of the Cisco Webex App. The attack vector is network-based, meaning that an attacker can exploit this vulnerability remotely without requiring physical access to the affected system.
The attack complexity is categorized as low, indicating that no advanced skills or resources are necessary for an attacker to exploit this vulnerability. Additionally, no privileges are required for the attacker, and user interaction is needed as the user must click the crafted meeting invite link.
The impact on confidentiality, integrity, and availability is high, as a successful exploit could result in the attacker executing arbitrary commands on the host of the targeted user.
Risk & Impact Analysis
Real-world deployment risk is significant due to the nature of the vulnerability. Attackers may leverage this vulnerability to execute arbitrary commands, which could lead to unauthorized access and control over the affected user’s system. This highlights the need for organizations to assess their exposure and implement mitigation strategies.
The urgency assessment based on the CVSS score indicates that organizations should prioritize patching immediately to minimize the risk of exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Cisco Webex Teams include 44.6 and 44.7. Organizations must ensure they apply any available patches to mitigate the risk.
Mitigation & Remediation
To mitigate this vulnerability, organizations should upgrade to the latest version of Cisco Webex Teams. Ensure that all users are educated about the risks of clicking on unknown links, especially in meeting invites.
For further security assessments, organizations can utilize application security assessments to identify potential vulnerabilities in their systems.
Detection Guidance
Organizations should monitor logs for any suspicious activities related to the Webex App. Behavioral anomalies such as unexpected file downloads should be flagged and investigated. Additionally, network signatures can be established to detect unusual traffic patterns associated with this vulnerability.
AppSecure Threat Intelligence Insight
The vulnerability represents a growing trend in targeting applications that facilitate remote communication. Security teams should remain vigilant and adapt their strategies to address similar vulnerabilities in the future.
For ongoing education and best practices, organizations can refer to the following resources: penetration testing methodology, vulnerability management programs, and API security testing to strengthen their defenses.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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