Mozilla leaks developers’ personal data


Mozilla leaks developers’ personal data

Clare McDonald

The open-source software community Mozilla has leaked the personal data of 76,000 users of its Mozilla Developer Network (MDN).

One of Mozilla’s developers discovered a failing process, which led to thousands of email addresses and around 4,000 encrypted user passwords being accidentally disclosed.


The fault, which started on 23 June, had been ongoing for 30 days. The dump file containing the data created by this fault was removed from the server as soon as the issue was discovered, and the failing process was shut down.

In a blog post addressing the issue, Stormy Peters, director of developer relations for Mozilla, assured users that the passwords obtained cannot by themselves be used to do any damage or access the MDN.

But it is still recommended that users change passwords, especially where the same passwords to those obtained may be used for access on other sites.

“While we have not been able to detect malicious activity on that server, we cannot be sure there wasn’t any such access.” He said,

“We are known for our commitment to privacy and security, and we are deeply sorry for any inconvenience or concern this incident may cause you.”

A few years ago, Mozilla was forced to issue a fix for the Firefox 16 browser a day after its release due to security flaws that would allow hackers to download user browsing history.

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