How severe is CVE-2015-7204?

CVE-2015-7204 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2015-7204 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-7204?

CVE-2015-7204 primarily affects Mozilla Firefox. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-7204?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-7204 published?

CVE-2015-7204 was published on 2015-12-16 and last updated on 2026-06-17.

CVE-2015-7204

CVE-2015-7204 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-17.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 3% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-17
Affected product: Mozilla Firefox
Published: 2015-12-16
Last modified: 2026-06-17

Description

Mozilla Firefox before 43.0 does not properly store the properties of unboxed objects, which allows remote attackers to execute arbitrary code via crafted JavaScript variable assignments.

Frequently asked questions

What is CVE-2015-7204?: Mozilla Firefox before 43.0 does not properly store the properties of unboxed objects, which allows remote attackers to execute arbitrary code via crafted JavaScript variable assignments.
How severe is CVE-2015-7204?: CVE-2015-7204 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2015-7204 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-7204?: CVE-2015-7204 primarily affects Mozilla Firefox. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-7204?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-7204 published?: CVE-2015-7204 was published on 2015-12-16 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:41.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:41.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:41.0.2:*:*:*:*:*:*:*

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