Ethical Hacking News
Gyazo, a popular image-sharing service, has been embroiled in a significant data breach that has left millions of users vulnerable to potential exploitation. The breach, which is believed to have occurred as a result of a vulnerability in the service’s image upload server, has exposed approximately 23.62 million user records, including sensitive information such as names, email addresses, and password hashes. To protect users, Helpfeel has taken steps to prevent further harm and is urging users to change their passwords and be vigilant for suspicious communications. The breach highlights the risks of vulnerabilities in systems that handle and store user-generated content, and serves as a reminder for software companies and users alike to prioritize security and take proactive steps to protect sensitive information.
Approximately 23.62 million Gyazo user records were compromised in the data breach. The breach was caused by a vulnerability in the service's image upload server. Paid card data was not affected in the breach. Exposed image metadata records, including 490 million records linked to images uploaded in or before January 2019. Helpfeel has taken steps to prevent further harm, including blocking access routes and remediation of the vulnerability. Users are advised to change their passwords and stay alert for suspicious emails or communications.
Gyazo, a popular cross-platform tool for capturing screenshots, GIFs, and short screen recordings, has been embroiled in a significant data breach that has left millions of users vulnerable to potential exploitation. According to the Japanese software company Helpfeel, which operates Gyazo, approximately 23.62 million user records were compromised in the breach, which is believed to have occurred as a result of a vulnerability in the service’s image upload server.
The vulnerability was reportedly exploited by a threat actor, who gained unauthorized access to the Gyazo servers on September 11. The attacker was able to run malicious commands, and by the following day, they had accessed a database containing a substantial amount of user information, including names, email addresses, password hashes, user and device IDs, X integration tokens, profile details, usage statistics, and billing information.
It is worth noting that payment card data was not affected in the breach. However, the stolen data may include names or nicknames, email addresses, password hashes, user IDs, device IDs, login session IDs, X integration tokens, Google SSO email addresses, profile information, language preferences, registration and last login dates and times, subscription plans, billing status, and usage statistics. The affected records also include anonymous accounts without registered email addresses.
Furthermore, the breach exposed approximately 490 million image metadata records, mainly linked to images uploaded in or before January 2019. Metadata from another 2.4 million images was also accessed through specific searches. The exposed information may include image IDs, upload IP addresses, User-Agent data, EXIF location information, OCR text, image titles, source URLs, other metadata, and hashed passphrases for private images. Some of this information could potentially be used to reconstruct Gyazo image URLs and access images without authorization.
In light of this breach, Helpfeel has taken steps to prevent further harm, including blocking all access routes used in the incident and completing remediation of the vulnerability that was exploited. The company has also confirmed that a list of private images was obtained, but it has not confirmed that image files themselves were stolen.
To mitigate the risk of further account compromise or phishing attacks, Helpfeel is asking all Gyazo users to change their passwords, especially if the same or a similar password is used on other services. Users should also stay alert for suspicious emails, messages, or other communications that may attempt to exploit the breach.
As the investigation into the breach is still ongoing, the full extent of the damage may not be fully known until further details emerge. However, it is clear that the breach highlights the risks of vulnerabilities in systems that handle and store user-generated content. The incident serves as a reminder for software companies and users alike to prioritize security and take proactive steps to protect sensitive information.
Related Information:
https://www.ethicalhackingnews.com/articles/Gyazo-Data-Breach-A-Cautionary-Tale-of-Vulnerabilities-and-User-Generated-Content-ehn.shtml
https://securityaffairs.com/199338/data-breach/gyazo-data-breach-exposes-23-million-user-records.html
https://www.securityweek.com/23-million-user-records-compromised-in-gyazo-data-breach/
https://cybernews.com/security/helpfeel-gyazo-data-breach-exposed-millions-records/
Published: Fri Sep 18 14:42:31 2026 by llama3.2 3B Q4_K_M
