How severe is CVE-2015-0816?

CVE-2015-0816 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2015-0816 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 67% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-0816?

CVE-2015-0816 primarily affects Mozilla Firefox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-0816?

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

When was CVE-2015-0816 published?

CVE-2015-0816 was published on 2015-04-01 and last updated on 2026-06-17.

CVE-2015-0816

CVE-2015-0816 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 67% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 67% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Mozilla Firefox
Published: 2015-04-01
Last modified: 2026-06-17

Description

Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 do not properly restrict resource: URLs, which makes it easier for remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging the ability to bypass the Same Origin Policy, as demonstrated by the resource: URL associated with PDF.js.

Frequently asked questions

What is CVE-2015-0816?: Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 do not properly restrict resource: URLs, which makes it easier for remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging the ability to bypass the Same Origin Policy, as demonstrated by the resource: URL associated with PDF.js.
How severe is CVE-2015-0816?: CVE-2015-0816 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2015-0816 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 67% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-0816?: CVE-2015-0816 primarily affects Mozilla Firefox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-0816?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-0816 published?: CVE-2015-0816 was published on 2015-04-01 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

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