CVE-2025-27442 Overview
CVE-2025-27442 is a cross-site scripting (XSS) vulnerability affecting multiple Zoom Workplace applications. The flaw allows an unauthenticated attacker on an adjacent network to inject script content that compromises integrity when a user interacts with the malicious payload. Zoom published the issue in security bulletin ZSB-25013 and categorized it under CWE-79: Improper Neutralization of Input During Web Page Generation. The vulnerability spans desktop, mobile, SDK, and Zoom Rooms variants of the Workplace platform, broadening the exposure footprint across managed and shared devices.
Critical Impact
An adjacent-network attacker can trigger script execution in a Zoom Workplace client when a user performs a required interaction, resulting in a loss of integrity across confidential meeting content and session state.
Affected Products
- Zoom Meeting Software Development Kit (Android, Linux, macOS, iOS, Windows)
- Zoom Workplace, Zoom Workplace Desktop, and Zoom Workplace VDI (Windows)
- Zoom Rooms and Zoom Rooms Controller (Android, iPadOS, macOS, Linux, Windows)
Discovery Timeline
- 2025-04-08 - CVE-2025-27442 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-27442
Vulnerability Analysis
The issue is a client-side cross-site scripting weakness in Zoom Workplace applications. Zoom Workplace clients render dynamic content from meeting, messaging, or SDK-driven contexts. When input is not sanitized or encoded before rendering, an attacker can inject HTML or JavaScript that executes inside the trusted application context. Because the CVSS vector lists a scope change (S:C), the injected code can reach resources beyond the originally vulnerable component, including other UI surfaces in the Workplace client. The attack requires user interaction, meaning the victim must perform an action such as opening a crafted item or joining a controlled session.
Root Cause
The root cause is improper neutralization of untrusted input before it is embedded into a page or view rendered by the Zoom client, as classified under CWE-79. Zoom's advisory does not disclose the specific component, but the pattern aligns with insufficient output encoding in a WebView or embedded rendering context used across Workplace, Rooms, and the Meeting SDK.
Attack Vector
Exploitation requires adjacent-network access (AV:A), such as a shared Wi-Fi, VLAN, or Zoom Room network segment. An unauthenticated attacker delivers crafted content that reaches a Zoom Workplace client. When the victim interacts with the content, the injected script runs inside the Zoom application context and can tamper with rendered data or in-session integrity. No proof-of-concept exploit is public, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
For full technical conditions and fixed versions, consult the Zoom Security Bulletin ZSB-25013.
Detection Methods for CVE-2025-27442
Indicators of Compromise
- Unexpected pop-ups, dialogs, or UI redraws in the Zoom Workplace client immediately after joining a meeting or opening shared content.
- Zoom client process spawning unexpected child processes or initiating outbound connections to non-Zoom infrastructure.
- Workplace clients loading external script or resource URLs that do not match Zoom's documented service endpoints.
Detection Strategies
- Inventory Zoom Workplace, Zoom Rooms, Rooms Controller, Meeting SDK, and VDI client versions and compare against the fixed builds referenced in ZSB-25013.
- Monitor adjacent network segments (conference room Wi-Fi, guest VLANs) for anomalous HTTP responses or injected content directed at Zoom clients.
- Correlate endpoint telemetry for Zoom process behavior changes, such as new DLL loads, scripting engine invocation, or clipboard access after meeting join events.
Monitoring Recommendations
- Enable EDR process and child-process logging for Zoom.exe, ZoomRooms.exe, and equivalent binaries on macOS and Linux.
- Centralize Zoom client logs where available and alert on repeated rendering errors or script execution warnings.
- Track network flows from Zoom Rooms devices and flag traffic to domains outside of Zoom's published egress ranges.
How to Mitigate CVE-2025-27442
Immediate Actions Required
- Update all Zoom Workplace, Zoom Rooms, Rooms Controller, Meeting SDK, and Workplace VDI clients to the fixed versions listed in ZSB-25013.
- Prioritize patching for shared devices such as Zoom Rooms endpoints that sit on adjacent networks accessible to visitors.
- Audit SDK-based applications that embed Zoom Meeting functionality and rebuild them against the patched SDK release.
Patch Information
Zoom addressed the vulnerability in the client and SDK versions documented in Zoom Security Bulletin ZSB-25013. Administrators should enforce auto-update policies and verify installed versions against the bulletin's fixed-release table before closing remediation tickets.
Workarounds
- Restrict Zoom Rooms and Workplace clients to trusted network segments and isolate guest Wi-Fi from corporate conferencing infrastructure.
- Disable or limit features that render untrusted external content in meetings and chats until all clients are patched.
- Require user training to avoid interacting with unsolicited links, files, or shared content inside Zoom sessions originating from unknown participants.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
