CVE-2021-23956 Other in Firefox
Ambiguous file picker design allowed users to accidentally upload entire directories instead of single files, potentially exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-23956?
CVE-2021-23956 is a medium-severity vulnerability in Mozilla Firefox, published on 26 Feb 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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. This vulnerability affects Firefox < 85.
Which versions are affected by CVE-2021-23956?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2021-23956?
Upgrade to a fixed version.
Is CVE-2021-23956 being exploited?
There is no known exploitation of CVE-2021-23956 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-vjq2-3fhj-f82c, UBUNTU-CVE-2021-23956.