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CVE Database›CVE-2022-40958

CVE-2022-40958

Mozilla: Bypassing Secure Context restriction for cookies with __Host and __Secure prefix

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Severity

Moderate

Red Hat Product Security

6.1

CVSS 3.0

Review impact separately from score.

Published · September 20, 2022

Updated · November 21, 2025

Description

A flaw was found in Mozilla. The Mozilla Foundation Security Advisory describes the issue that by injecting a cookie with certain special characters, an attacker on a shared subdomain, which is not a secure context, could set and overwrite cookies from a secure context, leading to session fixation and other attacks.

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 3.0 · 6.1
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE-784 · Reliance on Cookies without Validation and Integrity Checking in a Security Decision