CVE-2021-23958: Medium severity Mozilla Firefox vulnerability
The browser could have been confused into transferring a screen sharing state into another tab, which would leak unintended information.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 85 - Upgrade
Upgrade
alpine/firefoxto a version that resolves this vulnerability.Fixed in 85.0-r0 - Upgrade
Upgrade
alpine/librewolfto a version that resolves this vulnerability.Fixed in 85.0-r0
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2021-23958?
CVE-2021-23958 has been rated as a medium severity vulnerability due to potential information leakage during screen sharing.
How do I fix CVE-2021-23958?
To fix CVE-2021-23958, users should update Mozilla Firefox to the latest version above 85.
Which versions of Firefox are affected by CVE-2021-23958?
CVE-2021-23958 affects Mozilla Firefox versions prior to 85.
What type of vulnerability is CVE-2021-23958?
CVE-2021-23958 is a security vulnerability related to screen sharing functionality leaking unintended information.
Can CVE-2021-23958 affect my privacy?
Yes, CVE-2021-23958 can compromise user privacy by unintentionally exposing shared screen content.