• Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
MUST READ

DoNot APT is expanding scope targeting European foreign ministries

 | 

Nippon Steel Solutions suffered a data breach following a zero-day attack

 | 

Iranian group Pay2Key.I2P ramps Up ransomware attacks against Israel and US with incentives for affiliates

 | 

Hackers weaponize Shellter red teaming tool to spread infostealers

 | 

Microsoft Patch Tuesday security updates for July 2025 fixed a zero-day

 | 

Italian police arrested a Chinese national suspected of cyberespionage on a U.S. warrant

 | 

U.S. CISA adds MRLG, PHPMailer, Rails Ruby on Rails, and Synacor Zimbra Collaboration Suite flaws to its Known Exploited Vulnerabilities catalog

 | 

IT Worker arrested for selling access in $100M PIX cyber heist

 | 

New Batavia spyware targets Russian industrial enterprises

 | 

Taiwan flags security risks in popular Chinese apps after official probe

 | 

U.S. CISA adds Google Chromium V8 flaw to its Known Exploited Vulnerabilities catalog

 | 

Hunters International ransomware gang shuts down and offers free decryption keys to all victims

 | 

SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 52

 | 

Security Affairs newsletter Round 531 by Pierluigi Paganini – INTERNATIONAL EDITION

 | 

North Korea-linked threat actors spread macOS NimDoor malware via fake Zoom updates

 | 

Critical Sudo bugs expose major Linux distros to local Root exploits

 | 

Google fined $314M for misusing idle Android users' data

 | 

A flaw in Catwatchful spyware exposed logins of +62,000 users

 | 

China-linked group Houken hit French organizations using zero-days

 | 

Cybercriminals Target Brazil: 248,725 Exposed in CIEE One Data Breach

 | 
  • Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
  • Home
  • Breaking News
  • Social Networks
  • Facebook is notifying 800,000 users affected by a blocking bug

Facebook is notifying 800,000 users affected by a blocking bug

Pierluigi Paganini July 03, 2018

Yesterday the social network giant Facebook started notifying 800,000 users affected by a blocking bug. The company has already fixed it.

When a Facebook user blocks someone, the blocked user will be not able to interact with him, this means that he will not see his posts, it will not able to start conversations on Messenger or add him as a friend. The blocked user may have also been able to contact the blocker via Messenger.

Facebook discovered a bug affecting its platform that allowed blocked users to interact with the accounts that decided to block them.  As result, blocked users were able to see some of the content posted by individuals who had blocked them.

The issue was introduced on May 29, and the social network giant addressed it on June 5.

“Starting today we are notifying over 800,000 users about a bug in Facebook and Messenger that unblocked some people they had blocked. The bug was active between May 29 and June 5 — and while someone who was unblocked could not see content shared with friends, they could have seen things posted to a wider audience. For example pictures shared with friends of friends. ” wrote Facebook Chief Privacy Officer Erin Egan.

According to Egan, one a user has been blocked will not see content shared only with friends, but he may have been shown content shared with “friends of friends.

Egan clarified that blocking also automatically unfriends users if they were previously friends.

Below the details shared by Egan on this specific bug.

  • It did not reinstate any friend connections that had been severed;
  • 83% of people affected by the bug had only one person they had blocked temporarily unblocked; and
  • Someone who was unblocked might have been able to contact people on Messenger who had blocked them.

Facebook has fixed the bug and everyone has been blocked again, the company is sending a notification t the affected accounts encouraging them to check their blocked list.

Facebook bug

 

[adrotate banner=”9″] [adrotate banner=”12″]

Pierluigi Paganini

(Security Affairs – Facebook, bug)

[adrotate banner=”5″]

[adrotate banner=”13″]


facebook linkedin twitter

Facebook Pierluigi Paganini Security Affairs Social Network

you might also like

Pierluigi Paganini July 10, 2025
DoNot APT is expanding scope targeting European foreign ministries
Read more
Pierluigi Paganini July 09, 2025
Nippon Steel Solutions suffered a data breach following a zero-day attack
Read more

leave a comment

newsletter

Subscribe to my email list and stay
up-to-date!

    recent articles

    DoNot APT is expanding scope targeting European foreign ministries

    APT / July 10, 2025

    Nippon Steel Solutions suffered a data breach following a zero-day attack

    Data Breach / July 09, 2025

    Iranian group Pay2Key.I2P ramps Up ransomware attacks against Israel and US with incentives for affiliates

    Malware / July 09, 2025

    Hackers weaponize Shellter red teaming tool to spread infostealers

    Malware / July 09, 2025

    Microsoft Patch Tuesday security updates for July 2025 fixed a zero-day

    Security / July 08, 2025

    To contact me write an email to:

    Pierluigi Paganini :
    pierluigi.paganini@securityaffairs.co

    LEARN MORE

    QUICK LINKS

    • Home
    • Cyber Crime
    • Cyber warfare
    • APT
    • Data Breach
    • Deep Web
    • Digital ID
    • Hacking
    • Hacktivism
    • Intelligence
    • Internet of Things
    • Laws and regulations
    • Malware
    • Mobile
    • Reports
    • Security
    • Social Networks
    • Terrorism
    • ICS-SCADA
    • POLICIES
    • Contact me

    Copyright@securityaffairs 2024

    We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.
    Cookie SettingsAccept All
    Manage consent

    Privacy Overview

    This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities...
    Necessary
    Always Enabled
    Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
    Non-necessary
    Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
    SAVE & ACCEPT