07 July 2026
Reference: CVE-2024-42009
1. What is being reported?
The vulnerability is a type of Cross-Site Scripting (XSS) in certain versions of Roundcube email software. It allows a remote attacker to exploit a weakness in how email content is handled, enabling them to access and send emails from a victim’s account without permission.
2. What this means in plain English
If your organisation uses Roundcube for email, attackers might be able to read confidential emails or send fake emails from your account. This could damage your reputation, lead to data breaches, or cause financial loss if fraudulent emails are sent.
3. Could this affect a small business?
Small organisations using affected versions of Roundcube (up to 1.5.7 and 1.6.7) could be at risk. If you do not use Roundcube or use a different email system, this vulnerability likely does not affect you.
4. What to do now
- Check if your email system uses Roundcube and identify the version.
- Ask your IT provider or software supplier if your Roundcube installation is affected by this vulnerability.
- Apply any available updates or patches from Roundcube immediately to fix the issue.
- Monitor your email accounts for unusual activity, such as unexpected sent messages.
5. Ask your IT provider
Can you confirm if our Roundcube email software is affected by CVE-2024-42009, and have the necessary security updates been applied?
6. Bottom line
If you use Roundcube for email, act quickly to update it and protect your organisation from email theft and fraud.
Information based on NVD, CISA KEV, and reputable security news reporting.