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Fencer Vulns
medium 6.5

CVE-2023-3482 json

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 s…

published 2023-07-05 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-44142

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

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.

Patch / fix

  • Mozilla Firefox 115
  • firefox Ubuntu 20.04 LTS 115.0+build2-0ubuntu0.20.04.3

ubuntu advisories UBUNTU-CVE-2023-3482

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • MozillaFirefox-branding-SLE SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +11 more 115-150200.9.13.1
  • MozillaFirefox SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +11 more 115.0-150200.152.93.1
  • MozillaFirefox-branding-SLE SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +5 more 115-35.12.2
  • MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +6 more 115.0-112.165.1
  • MozillaFirefox-branding-SLE SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 115-150000.4.25.1
  • MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 115.0-150000.150.91.1

suse advisories SUSE-SU-2023:2886-1SUSE-SU-2023:2850-1SUSE-SU-2023:2849-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 115.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:13037-1

  • firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +3 more 115.0-r0

alpine advisories ALPINE-CVE-2023-3482

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected products

  • Mozilla Firefox

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.