CVE-2013-4339

CVE-2013-4339 is a high-severity vulnerability in Wordpress with a CVSS 2.0 base score of 7.5. 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-20.

Key facts

Description

WordPress before 3.6.1 does not properly validate URLs before use in an HTTP redirect, which allows remote attackers to bypass intended redirection restrictions via a crafted string.

Frequently asked questions

What is CVE-2013-4339?
WordPress before 3.6.1 does not properly validate URLs before use in an HTTP redirect, which allows remote attackers to bypass intended redirection restrictions via a crafted string.
How severe is CVE-2013-4339?
CVE-2013-4339 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2013-4339 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4339?
CVE-2013-4339 affects Wordpress. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-4339?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-4339 published?
CVE-2013-4339 was published on 2013-09-12 and last updated on 2026-06-16.

References

Affected products (1)

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