CVE-2020-12414

Name: CVE-2020-12414
Creator: NVD / NIST
Published: 2020-07-09T15:15:11.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2020-12414 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. IndexedDB should be cleared when leaving private browsing mode and it is not, the API for WKWebViewConfiguration was being used incorrectly and requires the private instance of this object be deleted when leaving private mode. This vulnerability affects Firefox for iOS < 27.. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

Description

IndexedDB should be cleared when leaving private browsing mode and it is not, the API for WKWebViewConfiguration was being used incorrectly and requires the private instance of this object be deleted when leaving private mode. This vulnerability affects Firefox for iOS < 27.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS Probability

0.67%

47.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-459

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 27.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1646756Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-23/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1646756Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-23/Vendor Advisory

Timeline

Published: Jul 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12414?

How severe is CVE-2020-12414?

CVE-2020-12414 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12414?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-12414?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST