The only web service that has communicated this to me so far #IFTTT
"A major vulnerability in the technology that powers encryption across much of the internet was discovered this week. Like many other teams, we took immediate action to patch the vulnerability in our infrastructure.
IFTTT is no longer vulnerable.
Though we have no evidence of malicious behavior, we've taken the extra precaution of logging you out of IFTTT on the web and mobile. We encourage you to change your password not only on IFTTT, but everywhere, as many of the services you love were affected.
If you have any questions or concerns, please email firstname.lastname@example.org.
—The IFTTT Team "