William Wragg told the Times newspaper he had handed over the phone numbers of colleagues to a man he met on a dating app, part of what is reported to be a wider operation targeting people working in the British parliament.
The Times said those colleagues were then sent unsolicited flirtatious messages and two lawmakers had responded by sending explicit photographs of themselves.
"They had compromising things on me," Wragg, 36, told the newspaper. "They wouldn't leave me alone. They would ask for people. I gave them some numbers, not all of them. I told him to stop. He's manipulated me and now I've hurt other people."
News outlet Politico said 12 men including a serving government minister were known to have been targeted in the suspected operation, receiving flirtatious messages and pictures from people who called themselves Abi or Charlie.
Neither the Times or Politico said who was believed to be responsible for the messaging campaign.
Police in central England said they were investigating a report of malicious communications.
Finance minister Jeremy Hunt said: "The events of the last few days have been a great cause for concern."
"The lesson here for all MPs (Members of Parliament) is that they need to be very careful about cybersecurity"
A spokesperson for parliament said they were working to understand the messages, which have heightened concerns that lawmakers could be vulnerable to cyberattacks and bribery.
"Parliament takes security extremely seriously and works closely with government in response to such incidents," the spokesperson said. "We are encouraging anyone affected who has concerns to contact the Parliamentary Security Department."
Wragg has been a lawmaker for Prime Minister Rishi Sunak's Conservative Party since 2015 and is the chairman of a cross-party parliamentary committee that oversees constitutional issues and standards. Wragg's office did not immediately respond to a request for further comment.
