CVE-2023-3482

Name: CVE-2023-3482
Creator: NVD / NIST
Published: 2023-07-05T10:15:10.273+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2023-3482 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. When Firefox is configured to block storage of all cookies, it was still possible to store data in localstorage by using an iframe with a source of 'about:blank'. This could have led to malicious websites storing tracking data without permission. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

When Firefox is configured to block storage of all cookies, it was still possible to store data in localstorage by using an iframe with a source of 'about:blank'. This could have led to malicious websites storing tracking data without permission. This vulnerability affects Firefox < 115.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.48%

37.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 115.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1839464Issue Tracking, Permissions Required
https://security.gentoo.org/glsa/202401-10
https://www.mozilla.org/security/advisories/mfsa2023-22/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1839464Issue Tracking, Permissions Required
https://security.gentoo.org/glsa/202401-10
https://www.mozilla.org/security/advisories/mfsa2023-22/Vendor Advisory

Timeline

Published: Jul 5, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-3482?

How severe is CVE-2023-3482?

CVE-2023-3482 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2023-3482?

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-2023-3482?

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

Scan your code now

Source: NVD / NIST