Medium · published October 18, 2023
CVSS calls it medium at 6.1. It is confirmed in active exploitation. It sits in the 99.6th percentile for exploit probability.
⚠️ A crafty SVG embeds itself in your email — a sneaky way for attackers to execute JavaScript right in Roundcube! Think of it like a chef sneaking a secret ingredient into your dish that you never approved — it looks harmless at first, but it can change the entire recipe! If exploited, a remote attacker could run any JavaScript they desire, potentially leading to data theft or account takeovers. This could be especially devastating for users who trust the emails they receive and may unwittingly give up sensitive information.
Think of it like a chef sneaking a secret ingredient into your dish that you never approved — it looks harmless at first, but it can change the entire recipe! This stored XSS vulnerability arises from how Roundcube processes HTML emails containing improperly handled SVG documents, allowing attackers to inject malicious scripts into users' inboxes.
If exploited, a remote attacker could run any JavaScript they desire, potentially leading to data theft or account takeovers. This could be especially devastating for users who trust the emails they receive and may unwittingly give up sensitive information. Update Roundcube to version 1.4.15, 1.5.5, or 1.6.4 immediately to mitigate this vulnerability. Ensure that your email filtering also checks for harmful SVGs to provide an extra layer of security. You've got this! Follow these steps, and you'll keep your email secure and your users safe! 🛡️