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Hacking How Broken OTPs and Open Endpoints Turned a Dating App Into a Stalker’s Playground

Cryptic_r_j

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Private messages, passport information, sexual preferences, and more left vulnerable in Cerca Dating App​


Timeline & Responsible Disclosure: Upon identifying these vulnerabilities, I reached out to the Cerca team via email on February 23, 2025. The next day (Feb 24), we held a productive video call to discuss the vulnerabilities, potential mitigations, and next steps. During our conversation, the Cerca team acknowledged the seriousness of these issues, expressed gratitude for the responsible disclosure, and assured me they would promptly address the vulnerabilities and inform affected users.

Since then, I have reached out multiple times (on March 5 and March 13) seeking updates on remediation and user notification plans. Unfortunately, as of today’s publication date (April 21, 2025), I have been met with radio silence. To my knowledge, Cerca has not publicly acknowledged this incident or informed users about this vulnerability, despite their earlier assurances to me. They also never followed up with me following our call and ignored all my follow up emails.

However, I was able to independently confirm that the vulnerabilities detailed in this blog post have since been patched, enabling me to responsibly publish these findings.


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