CVE-2021-43542

Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols

published December 8, 2021

CVSS
—
EPSS
2%
Percentile
78.8
In the wild
Unconfirmed
What it is

Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01834 · 78.8th percentile
Published
2021-12-08T21:19Z
EPSS history
Timeline
  • 08 DEC 21:19Z
    Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols
    cvelistv5