CVE-2024-3863

The executable file warning was not presented when downloading .xrm-ms files

Critical · published April 16, 2024

CVSS v3.1
9.8
EPSS
1%
Percentile
56.5
In the wild
Unconfirmed
What it is

🚨 A dangerous oversight allows .xrm-ms files to be downloaded without the usual executable warning! That's like receiving a package with a ticking time bomb inside, and nobody tells you to be careful! 🔥 Imagine a delivery service that drops off packages without checking their contents, leaving you to open a box that could contain anything from a harmless toy to a firework display! This vulnerability lets potentially harmful executable files pass through undetected on Windows systems. An attacker could sneak in malicious .xrm-ms files, which could lead to malware installation or even complete system compromise! This is absolutely devastating because users are left unaware of the risk lurking in their downloads. If exploited, it could spell chaos for personal data and system integrity.

Put simply

Imagine a delivery service that drops off packages without checking their contents, leaving you to open a box that could contain anything from a harmless toy to a firework display! This vulnerability lets potentially harmful executable files pass through undetected on Windows systems. This vulnerability in Firefox and Thunderbird allows .xrm-ms files to be downloaded without presenting the usual executable file warning, specifically impacting versions below Firefox 125 and Thunderbird 115.10. Effectively, this means harmful code can be introduced without the user's knowledge.

What to do

An attacker could sneak in malicious .xrm-ms files, which could lead to malware installation or even complete system compromise! This is absolutely devastating because users are left unaware of the risk lurking in their downloads. If exploited, it could spell chaos for personal data and system integrity. To protect your system, update Firefox to version 125 or later and Thunderbird to version 115.10 or later immediately! Ensure all users are aware of the risks and monitor for any suspicious file downloads. Regularly review your software to stay protected. You've got this! Stay vigilant and keep your systems updated—security hero status: activated! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00812 · 56.5th percentile
Published
2024-04-16T15:14Z
EPSS history
Timeline
  • 16 APR 15:14Z
    The executable file warning was not presented when downloading .xrm-ms files
    cvelistv5