What is CVE-2021-23956?

CVE-2021-23956 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 6.5/10. Published 2021-02-26.

How severe is CVE-2021-23956?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Mozilla Firefox

CVE-2021-23956

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.

EPSS: 0.010 (59.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Mozilla Firefox — versions < 85

References

security@mozilla.org (x_refsource_MISC, Release Notes, Vendor Advisory)
security@mozilla.org (Exploit, Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-23956?: CVE-2021-23956 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 6.5/10. Published 2021-02-26.
How severe is CVE-2021-23956?: Medium severity. CVSS v3 base score is 6.5 out of 10.