CVE-2021-29955

Name of the Vulnerable Software and Affected Versions Firefox ESR versions prior to 78.9 Firefox versions prior to 87

Description The issue is related to insufficient neutralization of special elements in a request, which may allow a remote attacker to access confidential data. It is also described as a transient execution vulnerability, specifically Floating Point Value Injection (FPVI), allowing an attacker to leak arbitrary memory addresses and potentially enabling JIT type confusion attacks.

Recommendations For Firefox ESR versions prior to 78.9, update to version 78.9 or later. For Firefox versions prior to 87, update to version 87 or later.