What happened
Photo-sharing platform Flickr confirmed a potential data breach that exposed users’ names and email addresses through a backend API misconfiguration. According to the notification sent to affected users, an internal API endpoint was left accessible without adequate authorization checks, allowing third parties to query and retrieve account metadata for a subset of Flickr users. The exposed data included account names and associated email addresses but, according to Flickr, did not include passwords or financial information. The company said it identified and secured the misconfigured API after detecting unusual access patterns and initiated an internal investigation to determine the scope of the exposure. Notifications were sent to impacted users with information about the breached data and steps being taken to secure systems.
Who is affected
Flickr account holders whose names and email addresses were stored in the affected API database are affected by this breach, as those pieces of personal information were accessible through the misconfiguration.
Why CISOs should care
Data exposures that leak personally identifiable information, even absent financial credentials, can lead to elevated phishing risk and privacy fallout, particularly when originating from misconfigured backend services.
3 practical actions
- Audit API access controls. Review backend endpoints for proper authorization checks on user data.
- Monitor for abnormal API access patterns. Detect unusual query volumes or unauthorized retrieval attempts.
- Notify and educate affected users. Inform impacted account holders about the exposure and recommended precautionary steps.