CVE-2025-46786 is a medium-severity vulnerability classified under CWE-79, which pertains to improper neutralization of input during web page generation, commonly known as Cross-site Scripting (XSS). This vulnerability affects Zoom Communications, Inc's Zoom Workplace Apps. The flaw allows an authenticated user to inject malicious scripts into the application interface, potentially impacting the integrity of the app via network access. The vulnerability requires user interaction (UI:R) but does not require privileges (PR:N) beyond authentication, and can be exploited remotely over the network (AV:N). The CVSS 3.1 base score is 4.3, reflecting a medium severity level. The impact is limited to integrity (I:L) with no direct confidentiality or availability impact. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability arises from insufficient input sanitization or encoding when generating web pages within the Zoom Workplace Apps, allowing malicious script injection that could manipulate app behavior or display misleading information to users. Since the attacker must be authenticated, the threat surface is somewhat reduced, but the risk remains significant in environments where many users have access to the app. This vulnerability could be leveraged for targeted attacks, such as session manipulation, phishing within the app, or spreading malware through crafted content. Given the widespread use of Zoom Workplace Apps for collaboration, this vulnerability could affect many organizations if exploited.

For European organizations, the impact of this vulnerability could be significant in sectors relying heavily on Zoom Workplace Apps for internal communication and collaboration, such as finance, healthcare, and government. The integrity compromise could lead to misinformation, manipulation of app content, or unauthorized actions performed within the app context, potentially undermining trust in communications and workflows. While confidentiality and availability are not directly impacted, the integrity issues could facilitate social engineering attacks or lateral movement within networks. Organizations with large user bases and extensive use of Zoom Workplace Apps are at higher risk. Additionally, regulatory frameworks like GDPR emphasize data integrity and security, so exploitation could lead to compliance issues and reputational damage. The lack of known exploits currently provides a window for proactive mitigation before widespread attacks occur.

1. Implement strict input validation and output encoding in all web page generation components of Zoom Workplace Apps to neutralize malicious scripts. 2. Apply the latest security patches from Zoom as soon as they become available; monitor Zoom security advisories closely. 3. Limit user privileges within the app to the minimum necessary to reduce the number of authenticated users who can exploit this vulnerability. 4. Employ network segmentation and access controls to restrict exposure of Zoom Workplace Apps to trusted users and devices only. 5. Educate users about the risks of interacting with unexpected or suspicious content within the app, emphasizing caution even when authenticated. 6. Use Content Security Policy (CSP) headers if configurable within the app environment to restrict the execution of unauthorized scripts. 7. Conduct regular security assessments and penetration testing focused on web application vulnerabilities, including XSS, in collaboration tools. 8. Monitor application logs and network traffic for unusual activities that could indicate exploitation attempts.