Zoom Account Hijack Flaw? What You Need to Know

Spike Team
By Spike Team, December 16, 2023, 6 min read
Zoom hijack flaw

The recent revelation of a significant security flaw within Zoom, a popular video conferencing platform, has sparked widespread concern and attention. This vulnerability, identified and reported by ethical hackers, exposed a critical gap in Zoom’s security, particularly affecting its Zoom Rooms service. The flaw could allow unauthorized access to private and corporate meetings, team chats, and a wealth of confidential information, posing a significant threat to the privacy and security of users worldwide.


This incident highlights the ever-present risks in our increasingly interconnected world and the constant battle between maintaining usability and ensuring security. It also underscores the importance of vigilant cybersecurity practices and the role of ethical hacking in uncovering potential threats. As we look at what happened in this incident, we aim to provide a comprehensive overview of the nature of the flaw, its implications for users and businesses, and the crucial steps Zoom took to mitigate this risk. For IT and security professionals, understanding this incident is not just about responding to a specific vulnerability; it’s about adapting to the daily challenges of digital security and fortifying defenses against evolving threats.


In this blog, we will guide you through the details of the Zoom account hijack flaw, its discovery, the potential avenues of exploitation, and the proactive measures needed to safeguard against such vulnerabilities – even if you don’t use Zoom. Our focus is to equip IT professionals with the knowledge and strategies necessary to protect their organizations and users in an environment where digital threats are an ever-changing reality.



What Happened?

AppOmni Offensive Security Engineer Ciarán Cotter first wrote about the details of the bug in a recent blog post. The post explains how he and his colleagues used the vulnerability to gain access to Zoom Rooms service accounts at the HackerOne H1-4420 event on June 22, 2023. Zoom sponsored the event and awarded bug bounty payouts to participating groups of white-hat hackers.


“A Room service account is automatically assigned an email address by Zoom. This is generated in the format rooms_@companydomain.com. In this case, the account ID is the user ID value of the service account. The email domain is directly inherited from the user with the Owner role in the tenant at the time of creation – if the Owner has the email address owner@example.com, then the service account will be room_@example.com. While there are several ways to leak the account ID within Zoom, simply being in the same meeting as the Room and messaging the Room on Team Chat would disclose the Room’s entire email address.”


Companies using free email services such as Outlook or Gmail were particularly vulnerable to this bug. For instance, creating a Gmail account mirroring a Zoom Room’s generated email (like rooms_12345@gmail.com) was straightforward and cost-free. This ease of duplication made it simple to discover and exploit a Zoom Room’s service email, accessible in meetings or via Team Chat.


Once inside the Zoom system, hijackers could join or host meetings, access contact lists, and infiltrate Team Chat and Whiteboard sessions. This breach posed a significant risk, potentially exposing sensitive internal communications, strategic plans, and financial details. AppOmni found that these compromised Room accounts couldn’t be ejected from Team Chat channels, even by administrators or the account Owner, amplifying the risk.


Following several conversations with the Zoom team with OppOmni, Zoom validated and promptly resolved the vulnerability in a recent software update. Zoom removed the ability to activate Zoom Room accounts to mitigate this vulnerability.



How Should IT Teams Take Proactive Steps?

In the wake of the Zoom account hijack vulnerability, IT teams must proactively safeguard their organization’s digital infrastructure. Here are vital steps that IT and security teams should consider implementing heading into 2024:

  1. Regularly Update Software

    Ensure all software, especially communication tools like Zoom, are updated with the latest security patches. These updates often contain fixes for known vulnerabilities.

  2. Educate Users

    Conduct regular training sessions for employees to recognize phishing attempts and other social engineering tactics that could compromise account security.

  3. Implement Strong Authentication Protocols

    Use strong, unique passwords for each service and enable two-factor authentication wherever possible to add an extra layer of security.

  4. Monitor Account Activity

    Set up systems to monitor unusual account activity, such as unexpected access from unfamiliar locations or devices, which could indicate a breach.

  5. Review and Restrict Access Permissions

    Regularly review who has access to what within your organization. Limiting access to sensitive information to only those who need it can reduce the risk of internal and external breaches.

  6. Establish a Rapid Response Plan

    Have a clear, well-practiced plan for responding to security incidents. This should include steps for containing the breach, assessing the damage, and communicating with affected parties.

  7. Collaborate with Security Experts

    Consider partnering with cybersecurity firms or ethical hackers to identify and address vulnerabilities in your systems before malicious actors can exploit them.

  8. Audit and Assess Your Tools

    Regularly audit your organization’s tools and software. Ensure they comply with your security standards and are not prone to known vulnerabilities.

By taking these proactive steps, IT teams can significantly reduce the risk of similar vulnerabilities and safeguard their organization’s digital assets and communications.



Other Alternatives to Zoom?

In light of recent security concerns with Zoom, it’s prudent for IT teams to explore alternative video conferencing solutions that offer robust security and seamless collaboration. One such alternative is Spike for Teams.



Spike for Teams: Built In 1-Click Video Meetings


Spike for Teams stands out with its ease of use and integration into existing workflows. With one-click video and audio meetings directly from your team chat and email inbox, Spike eliminates the need for app switching, creating new accounts, or handling cumbersome logins. It integrates video meetings and audio calls into your inbox, allowing a smooth transition from text to voice to video calls without disrupting your workflow. On top of replacing Zoom, it’s also a top-rated Slack alternative.



Enhanced Collaboration Features

Spike’s built-in video meetings cater to both quick one-on-one calls and larger team meetings. A notable feature is screen sharing, ensuring everyone is on the same page during discussions. This feature enhances collaboration, especially when visual aids are essential to convey complex ideas​.



Accessibility and Convenience

What sets Spike apart is its accessibility and convenience. Starting a video meeting is as simple as a single click from your ongoing conversation. This feature is handy for spontaneous meetings or when a discussion needs to escalate from text to a call. Additionally, Spike allows you to express yourself more dynamically in calls with Emoji Reactions, adding a personal touch to digital conversations​​.



Universal Connectivity

Spike ensures you can have a video meeting with anyone, regardless of whether they are on Spike. You can share a meeting invite directly from your conversation, allowing participants to join easily using other email services like Google Workspace, Microsoft 365, Gmail, Outlook, or Yahoo. This feature is invaluable for teams interacting with external clients or partners who may use different communication platforms.



Seamless Meeting Scheduling

Organizing meetings is streamlined with Spike, as secure video meeting links are automatically included in calendar event invites. This integration removes the need for additional plugins or complex setups, making the scheduling of video meetings hassle-free.


Overall, Spike for Teams offers a versatile and user-friendly alternative to Zoom, emphasizing seamless integration, ease of access, and effective collaboration from your inbox. Its core features enhance productivity and ensure smooth communication within and outside your organization.




As we wrap up our discussion on the recent Zoom account hijack flaw and its implications, it’s clear that this incident serves as a crucial reminder of the ongoing challenges in digital security. For IT teams, staying vigilant, updating applications, educating users, and being prepared for rapid response are key to safeguarding against such vulnerabilities.

Spike Team
Spike Team The Spike team posts about productivity, time management, and the future of email, messaging and collaboration.

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