Critical · published December 14, 2022
🚨 A CAPTCHA bypass could let mischief-makers subscribe countless people to your newsletter without their consent! 🔥 Think of it like a restaurant that has no checks at the front door. Without a proper welcome, anyone can walk in and sit at a table, even if they haven’t made a reservation! This vulnerability allows attackers to fill your newsletter list with random or even malicious emails, cluttering your communications and potentially leading to spam complaints. Imagine the chaos if your inbox is flooded with fake subscribers — it’s not just annoying, it could damage your sender reputation!
Think of it like a restaurant that has no checks at the front door. Without a proper welcome, anyone can walk in and sit at a table, even if they haven’t made a reservation! The flaw in the fp_newsletter extension allows attackers to bypass the CAPTCHA challenge, meaning they can subscribe users without their consent. This affects versions prior to 1.1.1, 1.2.0, 2.x before 2.1.2, 2.2.1 through 2.4.0, and 3.x before 3.2.6 for TYPO3.
This vulnerability allows attackers to fill your newsletter list with random or even malicious emails, cluttering your communications and potentially leading to spam complaints. Imagine the chaos if your inbox is flooded with fake subscribers — it’s not just annoying, it could damage your sender reputation! Update your TYPO3 fp_newsletter extension to the latest version (3.2.6 or higher) immediately to patch this vulnerability. It's also wise to review your subscription processes and consider additional verification methods to prevent unwanted sign-ups. You've got this! With a quick update, you'll keep your newsletter safe and sound. 🛡️