Security Experts:

Connect with us

Hi, what are you looking for?

SecurityWeekSecurityWeek

Cloud Security

EventBuilder Exposed Information of Over 100,000 Event Registrants

Event management company EventBuilder exposed files containing the personal information of at least 100,000 users who registered for events on its platform.

Event management company EventBuilder exposed files containing the personal information of at least 100,000 users who registered for events on its platform.

The data leak was discovered by researcher Bob Diachenko and Clario, a company that provides consumer security and privacy products. The exposed files were found using Grayhat Warfare, a search engine for public buckets.

Diachenko and Clario identified an unprotected Microsoft Azure Blob storage containing thousands of large CSV and JSON files. These files stored more than a million records, including ones containing the personal details of at least 100,000 event registrants.

“The storage in question was supposed to be partially public, to host recorded sessions for link-only access. However, for some reason, the webinar organizers were putting registrant information into the blob,” Clario explained in a blog post. “This meant it was open to indexing by a Public Bucket searcher (Grayhat Warfare), thus compromising their personal information and potentially putting them in danger of being targeted by hackers from across the globe.”

The exposed information included full name, email address, company name, role within the company, phone numbers, and information from the questionnaires answered by users.

EventBuilder is a widely used event management platform that is designed for Microsoft Teams and other Microsoft products. The company says its platform is used to produce more than 1,000 virtual events every month.

The data exposure was discovered on June 10 and it was immediately reported to EventBuilder, which at some point addressed the issue.

SecurityWeek has reached out to EventBuilder for comment and will update this article if the company responds.

Related: Companies Still Exposing Sensitive Data via Known Salesforce Misconfiguration

Related: Razer Customer Data Exposed by Server Misconfiguration

Related: Misconfigured Microsoft Power Apps Portals Exposed Millions of Records

Written By

Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

Click to comment

Expert Insights

Related Content

Application Security

Cycode, a startup that provides solutions for protecting software source code, emerged from stealth mode on Tuesday with $4.6 million in seed funding.

Mobile & Wireless

Technical details published for an Arm Mali GPU flaw leading to arbitrary kernel code execution and root on Pixel 6.

Mobile & Wireless

Apple rolled out iOS 16.3 and macOS Ventura 13.2 to cover serious security vulnerabilities.

Cloud Security

VMware vRealize Log Insight vulnerability allows an unauthenticated attacker to take full control of a target system.

Mobile & Wireless

Apple’s iOS 12.5.7 update patches CVE-2022-42856, an actively exploited vulnerability, in old iPhones and iPads.

Vulnerabilities

Security researchers have observed an uptick in attacks targeting CVE-2021-35394, an RCE vulnerability in Realtek Jungle SDK.

Vulnerabilities

Google has awarded more than $25,000 to the researchers who reported the vulnerabilities patched with the release of the latest Chrome update.

Mobile & Wireless

Two vulnerabilities in Samsung’s Galaxy Store that could be exploited to install applications or execute JavaScript code by launching a web page.