CVE-2021-23961
Mozilla: More internal network hosts could have been probed by a malicious webpage
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 19, 2021
Updated · November 22, 2025
Description
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor