How severe is CVE-2009-3890?

CVE-2009-3890 has a CVSS 2.0 base score of 6.0, rated medium severity.

Is CVE-2009-3890 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3890?

CVE-2009-3890 affects Wordpress. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-3890?

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

When was CVE-2009-3890 published?

CVE-2009-3890 was published on 2009-11-17 and last updated on 2026-06-16.

CVE-2009-3890

CVE-2009-3890 is a medium-severity vulnerability in Wordpress with a CVSS 2.0 base score of 6.0. 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-94.

Key facts

Severity: Medium (CVSS 2.0 base score 6.0)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Wordpress
Published: 2009-11-17
Last modified: 2026-06-16

Description

Unrestricted file upload vulnerability in the wp_check_filetype function in wp-includes/functions.php in WordPress before 2.8.6, when a certain configuration of the mod_mime module in the Apache HTTP Server is enabled, allows remote authenticated users to execute arbitrary code by posting an attachment with a multiple-extension filename, and then accessing this attachment via a direct request to a wp-content/uploads/ pathname, as demonstrated by a .php.jpg filename.

Frequently asked questions

What is CVE-2009-3890?: Unrestricted file upload vulnerability in the wp_check_filetype function in wp-includes/functions.php in WordPress before 2.8.6, when a certain configuration of the mod_mime module in the Apache HTTP Server is enabled, allows remote authenticated users to execute arbitrary code by posting an attachment with a multiple-extension filename, and then accessing this attachment via a direct request to a wp-content/uploads/ pathname, as demonstrated by a .php.jpg filename.
How severe is CVE-2009-3890?: CVE-2009-3890 has a CVSS 2.0 base score of 6.0, rated medium severity.
Is CVE-2009-3890 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3890?: CVE-2009-3890 affects Wordpress. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-3890?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3890 published?: CVE-2009-3890 was published on 2009-11-17 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*

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