April 2022 Summaries
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RainLoop, a widely used open-source webmail client, has been identified with a code vulnerability that allows attackers to steal sensitive information from users' inboxes. The vulnerability, known as Stored Cross-Site-Scripting (XSS), can be exploited by sending a maliciously crafted email to a victim who uses RainLoop as their mail client. This vulnerability is due to a logic bug in the sanitization process of HTML code, which often goes unnoticed during security audits. An attacker can control attributes of the `<body>` tag and inject user-controlled input into the HTML code, leading to potential security breaches. A patch has been developed by the authors but is not officially released yet, recommending users to migrate to a fork called SnappyMail or apply an inofficial patch at their own risk. The vulnerability highlights the importance of proper sanitization and DOM tree object handling in web applications.
Apr 19, 2022
1,534 words in the original blog post.