Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Endpoint

10/9/2019
12:15 PM
50%
50%

Twitter Slip-Up Spills MFA Phone Numbers, Emails to Advertisers

Email addresses and phone numbers provided to secure user accounts were accidentally shared with marketers.

Twitter account holders who provided an email address or phone number to enable multifactor authentication may have had their data used for advertising purposes, Twitter reports.

The issue lies in Tailored Audiences and Partner Audiences, an advertising system offered to help marketers better connect with people on the platform. Tailored Audiences lets companies aim ads at customers based on their own marketing lists, containing email addresses and phone numbers obtained outside Twitter. Advertisers can upload marketing lists to Twitter and advertise to accounts linked to the same email address — people who already know the brand.

Twitter found that when advertisers uploaded marketing lists, they were accidentally matched with email addresses and phone numbers provided to the social media giant for account security. As a result, users' contact data was used in targeted ads without their knowledge.

It's unknown how many people were affected by the mistake, Twitter reports, noting that no personal data was externally shared with its partners or third parties. This issue was fixed on September 17 and the company is no longer using security contact information for advertising.

Read more details here.

Check out The Edge, Dark Reading's new section for features, threat data, and in-depth perspectives. Today's top story: "Can the Girl Scouts Save the Moon from Cyberattack?"

Dark Reading's Quick Hits delivers a brief synopsis and summary of the significance of breaking news events. For more information from the original source of the news item, please follow the link provided in this article. View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Threaded  |  Newest First  |  Oldest First
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: Our Endpoint Protection system is a little outdated... 
Current Issue
The Year in Security: 2019
This Tech Digest provides a wrap up and overview of the year's top cybersecurity news stories. It was a year of new twists on old threats, with fears of another WannaCry-type worm and of a possible botnet army of Wi-Fi routers. But 2019 also underscored the risk of firmware and trusted security tools harboring dangerous holes that cybercriminals and nation-state hackers could readily abuse. Read more.
Flash Poll
Rethinking Enterprise Data Defense
Rethinking Enterprise Data Defense
Frustrated with recurring intrusions and breaches, cybersecurity professionals are questioning some of the industrys conventional wisdom. Heres a look at what theyre thinking about.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-19740
PUBLISHED: 2019-12-12
Octeth Oempro 4.7 allows SQL injection. The parameter CampaignID in Campaign.Get is vulnerable.
CVE-2019-19746
PUBLISHED: 2019-12-12
make_arrow in arrow.c in Xfig fig2dev 3.2.7b allows a segmentation fault and out-of-bounds write because of an integer overflow via a large arrow type.
CVE-2019-19748
PUBLISHED: 2019-12-12
The Work Time Calendar app before 4.7.1 for Jira allows XSS.
CVE-2017-18640
PUBLISHED: 2019-12-12
The Alias feature in SnakeYAML 1.18 allows entity expansion during a load operation, a related issue to CVE-2003-1564.
CVE-2019-19726
PUBLISHED: 2019-12-12
OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from th...