Got this in my inbox and it appears to be very real. Here’s what it says:
Dear Website Optimiser user,We are writing to inform you of a potential security issue with Website Optimiser. By exploiting a vulnerability in the Website Optimiser Control Script, an attacker might be able to execute malicious code on your site using a Cross-Site Scripting (XSS) attack. This attack can only take place if a website or browser has already been compromised by a separate attack. While the immediate probability of this attack is low, we urge you to take action to protect your site.
We have fixed the bug, and all new experiments are not susceptible. However, any experiments you are currently running need to be updated to fix the bug on your site. Additionally, if you have any Website Optimiser scripts from paused or stopped experiments created before 3 December 2010, you will need to remove or update that code as well.
There are two ways to update your code. You can either stop current experiments, remove the old scripts and create a new experiment, or you can update the code on your site directly. We strongly recommend creating a new experiment as it is the simpler method.
If you need to see what they’re suggesting as a fix you can download this text file with the email’s contents.
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