CVE-2021-23956: Medium severity Mozilla Firefox vulnerability
An ambiguous file picker design could have confused users who intended to select and upload a single file into uploading a whole directory. This was addressed by adding a new prompt.
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-2021-23956?
CVE-2021-23956 has been rated as moderate severity due to the potential for user confusion and accidental directory uploads.
How do I fix CVE-2021-23956?
To fix CVE-2021-23956, update your Mozilla Firefox to version 85 or later.
What does CVE-2021-23956 affect?
CVE-2021-23956 affects Mozilla Firefox versions prior to 85.
What was the issue in CVE-2021-23956?
The issue in CVE-2021-23956 was an ambiguous file picker design that could mislead users into uploading entire directories instead of a single file.
What has been done to address CVE-2021-23956?
CVE-2021-23956 was addressed by introducing a new prompt to clarify the file selection process.