McGraw-Hill Confirms Data Breach Following Extortion Threat from ShinyHunters
New Booking.com data breach forces reservation PIN resets Booking.com is - as the name suggests - a website that allows users to book travel including flights, car rentals, hotels, and more.
Key points
- Data breach confirmed following extortion threat from ShinyHunters.
- Attributed to a Salesforce misconfiguration.
- Unauthorized access to a limited set of internal data from a Salesforce-hosted webpage.
Connected intelligence
Signal brief
Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.
Organization
- Published
- Apr 14, 2026
- Updated
- Jul 22, 2026
- Confidence
- Medium
- Evidence
- 6 sources
Structured assessment
Signal analysis
This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch internet-facing systems, credential abuse and exploit activity.
- Source type: possible insider or internal misuse
Business impact
- Impact area
- Confidentiality
- Likely asset
- User or customer data
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
New Booking.com data breach forces reservation PIN resets Booking.com is - as the name suggests - a website that allows users to book travel including flights, car rentals, hotels, and more. They are one of the largest such sites. Users have reported getting emails from noreply@booking.com informing them of a "cybersecurity incident" that may have exposed full names, email addresses, postal addresses, phone numbers, and communication with property providers. Booking.com is not being transparent about the number of users impacted, but said all users will be individually notified. They are also resetting user reservation PINs out of caution. European Gym giant Basic-Fit data breach affects 1 million members Basic-Fit is one of the largest gym chains in Europe with over 1700 clubs and 430 franchises in 12 countries. In a disclosure published on their website, they have announced a cyberattack that impacted full name, physical address, email address, phone number, date of birth, bank account details, and "other membership information." It appears to have impacted about 1 million members. McGraw-Hill confirms data breach following extortion threat McGraw-Hill is an education company that offers textbooks, online portals, and systems for K-12 schools and universities. This attack appears to have come from a misconfigured Salesforce page. McGraw-Hill says the data exposed was "limited and non-sensitive," but the attacker claims to have 45 million records containing personally identifiable information. Crypto-exchange Kraken extorted by hackers after insider breach Kraken says that attackers are threatening to release a video that shows internal systems that host client data. The article is a bit unclear but it does seem that the attackers were showing that they had actual access to the data, though it seems it was through inside employees and not via a technical hack (such as a vulnerability). Kraken said that funds are safe and employees have been terminated. They say the breach was limited to about 2,000 customers but have not shared what information was impacted. Fashion retailer Express left customers’ personal data and order details exposed to the internet This was a flaw appears to have been an "insecure direct object reference" vulnerability - where simply tweaking the web address is enough to pull up other pages you may not necessarily have been meant to see. In this case a researcher was able to access other users' order confirmation pages, which included names, phone numbers, email addresses; postal, billing, and delivery addresses; order details including the items that a customer purchased, and partial payment card information including the card type and the last four-digits. Fiverr Exposes Private Information of its Users Publicly on Google Search Results From our own staff writer Fria, a researcher on Hacker News claimed that Fiverr - a freelancer job board - was exposing sensitive personal documents such as tax forms containing Social Security Numbers. The data could easily be found by searching site:fiverr-res.cloudinary.com [keywords of choice, such as "form 1040" or a name] on most search engines including Google and even DuckDuckGo. According to our internal news chat, the data itself does appear to have been secured. Privacy Guides Executive Director Jonah Aragon was unable to reproduce the results on Google, but both Jonah and Fria were able to find the results on DuckDuckGo, though they no longer linked to a valid address.
When was this signal reported?
Shadow Tier lists Apr 14, 2026 as the signal date.
Which organization is connected to this signal?
Mheducation is the organization connected to this public signal.
Explore MheducationWhich impact area is relevant?
This signal is connected to data exposure and breach intelligence based on its reported consequences.
Explore data exposure and breach intelligenceRelated signals
Compare shared topics, actors and incident patterns before opening the full signal.
South Korean Diplomatic Academy Suffers Significant Data Leak Affecting 10,000 Diplomats
On July 21, 2026, the Korea National Diplomatic Academy, an institution affiliated with South Korea's Ministry of Foreign Affairs, confirmed a significant data leak impacting approximately 10,000 records of current and retired diplomats. The breach, which occurred in the academy's online education system, was discovered in early February 2026 after suspicious access was reported by a government agency. An unidentified attacker exploited a zero-day vulnerability in the server software and weaknesses in system security settings, maintaining unauthorized access from April to May 2025 until February 2026. The compromised data reportedly included names, user IDs, email addresses, encrypted passwords, job titles, and affiliated departments. While sensitive personal information such as resident registration numbers, mobile phone numbers, and home addresses were not present on the affected server, the leak of diplomat information raises concerns, especially given that the full list of diplomats and personnel at overseas missions is not publicly disclosed. The Foreign Ministry is investigating the incident and has urgently shut down the compromised system. They are operating under the assumption that a substantial volume of data was compromised, though the exact scale of the damage is still being assessed. The incident highlights the challenges in detecting sophisticated attacks that leverage previously unknown vulnerabilities.
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Healthcare AI Company Xsolis Suffers Data Breach Impacting 1.4 Million Individuals
Healthcare technology company Xsolis, Inc. has disclosed a data breach affecting nearly 1.4 million individuals. Tennessee-based Xsolis provides utilization management and revenue cycle solutions for hospitals, health systems, and payers. The company published a data security notice in early June, revealing that unauthorized activity was detected on its systems on January 22. The intrusion resulted from a targeted phishing attack carried out two days earlier. According to Xsolis, the hackers gained access to files storing personal and protected health information received by the company from its clients, including names, dates of birth, addresses, SSNs, health insurance information, and medical treatment information. While the data breach was disclosed two weeks ago, the US Department of Health and Human Services (HHS) has now disclosed the number of affected individuals. The Xsolis cybersecurity incident was added to the HHS data breach tracker on Monday, with the number of affected individuals listed as 1,396,519. Advertisement. Scroll to continue reading. No known ransomware group appears to have taken credit for the attack on the healthcare tech company. SecurityWeek has asked Xsolis whether it was targeted in an extortion attempt and, if so, whether a ransom has been paid. The company’s disclosure indicates that it’s “not aware of any actual or attempted misuse of information because of this incident”. It’s not uncommon for healthcare-related data breaches to affect millions of people. One recent example is the incident involving the dental benefits administrator DentaQuest , in which hackers stole information from 2.6 million accounts. 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CodeSecCon bridges the gap between dev and security. Discover best practices for secure coding, innovative risk-reduction tools, and safe AI integration to cultivate a true DevSecOps culture. Safely secure your apps! Xsolis breach exposes personal and health data of 1.4 million people Healthcare technology company Xsolis has disclosed a data breach impacting nearly 1.4 million individuals following a phishing attack. The Tennessee-based firm, which provides utilization management and revenue cycle solutions for healthcare providers, became aware of unauthorized access on January 22, 2026, after a phishing attack two days prior. The breach exposed personal and protected health information received from Xsolis’s hospital and payer clients, as reported by Security Affairs. The security incident, which occurred on January 20, 2026, allowed an unauthorized actor to acquire files containing sensitive information. This data may include names, addresses, dates of birth, Social Security numbers, health insurance details, and medical treatment information. Xsolis has launched an investigation, reported the incident to law enforcement, and is implementing enhanced security measures. Affected individuals are being notified by mail and offered free credit monitoring and identity protection services, along with access to a toll-free call center. The U.S. Department of Health and Human Services reported that 1,396,519 individuals were affected. No ransomware group has claimed responsibility for the attack at this time.
Related context
Origin Energy Discloses Data Breach Affecting 900,000 Customers
On July 28, 2026, Origin Energy, a major Australian energy company, publicly confirmed a significant data breach impacting approximately 900,000 current and former customers. The breach led to unauthorized access and exfiltration of personally identifiable information (PII), including names, addresses, dates of birth, phone numbers, account details, and partial payment information such as the last four digits of credit cards or the BSB and last three digits of bank accounts. Origin Energy first identified a potential security threat in early July 2026, which was initially not deemed credible. However, new information on July 22, 2026, confirmed a security incident had occurred, prompting immediate action and notification of authorities. An alleged hacker provided a media outlet with a sample of 50 customer records and screenshots of internal Origin Energy systems, corroborating the data exfiltration. The incident is currently under investigation by Australian authorities, including the Australian Cyber Security Centre, the National Office of Cyber Security, the Australian Federal Police, and the Office of the Australian Information Commissioner. The specific technical vector used for initial access remains undisclosed.
Related context
Coupang Data Breach: Authentication Failures Expose Customer Data in South Korea
South Korean e-commerce giant Coupang experienced a significant data breach between April and November 2026, with an additional access attempt in January. South Korea's Deputy Minister for Cybersecurity and Network Policy publicly attributed the incident to management failures and authentication vulnerabilities during a press conference on July 24, 2026. The attacker exploited user authentication vulnerabilities to gain unauthorized access to accounts without proper login credentials, leading to a large-scale unauthorized information leak. South Korean authorities emphasized that the breach was not the result of highly sophisticated intrusion techniques, but rather stemmed from fundamental security weaknesses in authentication mechanisms and inadequate security management practices. The breach resulted in large-scale unauthorized access to customer information. The unauthorized access has since been terminated. This incident has also led to a record fine of $422 million by South Korea's Personal Information Protection Commission (PIPC) and ongoing diplomatic discussions between South Korea and the U.S. due to Coupang being an American-owned company operating in South Korea.
Related context
DoorDash Confirms Data Breach After Social Engineering Attack
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Related context
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