Users of the picture-sharing site reported that their feeds also were being used to post weight loss spam.
A TechCrunch editor was among the victims.
The attackers could have busted into the accounts through, among other security weaknesses, third-party apps with security holes – or by inserting malicious code in “Pin This” widgets on other sites.
A representative from Pinterest told TechCrunch: “Our systems were alerted to some incidents of spam yesterday evening. These reports did not come in at a large scale.”
A Pinterest spokesperson told SCMagazine: “We began working on cleaning up and placing the accounts in safe mode immediately.”
Pinterest puts accounts with suspicious activity into safe mode so that no changes can be made. Users then must reset their passwords in order to unlock their accounts.
ThreatWatch is a regularly updated catalog of data breaches successfully striking every sector of the globe, as reported by journalists, researchers and the victims themselves.