How severe is CVE-2009-3016?

CVE-2009-3016 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-3016 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3016?

CVE-2009-3016 affects Apple Safari. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-3016?

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

When was CVE-2009-3016 published?

CVE-2009-3016 was published on 2009-08-31 and last updated on 2026-06-16.

CVE-2009-3016

CVE-2009-3016 is a medium-severity vulnerability in Apple Safari with a CVSS 2.0 base score of 4.3. 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-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Apple Safari
Published: 2009-08-31
Last modified: 2026-06-16

Description

Apple Safari 4.0.3 does not properly block javascript: and data: URIs in Refresh headers in HTTP responses, which allows remote attackers to conduct cross-site scripting (XSS) attacks via vectors related to (1) injecting a Refresh header that contains a javascript: URI, (2) entering a javascript: URI when specifying the content of a Refresh header, (3) injecting a Refresh header that contains JavaScript sequences in a data:text/html URI, or (4) entering a data:text/html URI with JavaScript sequences when specifying the content of a Refresh header.

Frequently asked questions

What is CVE-2009-3016?: Apple Safari 4.0.3 does not properly block javascript: and data: URIs in Refresh headers in HTTP responses, which allows remote attackers to conduct cross-site scripting (XSS) attacks via vectors related to (1) injecting a Refresh header that contains a javascript: URI, (2) entering a javascript: URI when specifying the content of a Refresh header, (3) injecting a Refresh header that contains JavaScript sequences in a data:text/html URI, or (4) entering a data:text/html URI with JavaScript sequences when specifying the content of a Refresh header.
How severe is CVE-2009-3016?: CVE-2009-3016 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-3016 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3016?: CVE-2009-3016 affects Apple Safari. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-3016?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3016 published?: CVE-2009-3016 was published on 2009-08-31 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apple:safari:4.0.3:*:*:*:*:*:*:*

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