How severe is CVE-2009-3622?

CVE-2009-3622 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-3622 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3622?

CVE-2009-3622 affects Wordpress. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-3622?

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

When was CVE-2009-3622 published?

CVE-2009-3622 was published on 2009-10-23 and last updated on 2026-06-16.

CVE-2009-3622

CVE-2009-3622 is a medium-severity vulnerability in Wordpress 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-310.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Wordpress
Published: 2009-10-23
Last modified: 2026-06-16

Description

Algorithmic complexity vulnerability in wp-trackback.php in WordPress before 2.8.5 allows remote attackers to cause a denial of service (CPU consumption and server hang) via a long title parameter in conjunction with a charset parameter composed of many comma-separated "UTF-8" substrings, related to the mb_convert_encoding function in PHP.

Frequently asked questions

What is CVE-2009-3622?: Algorithmic complexity vulnerability in wp-trackback.php in WordPress before 2.8.5 allows remote attackers to cause a denial of service (CPU consumption and server hang) via a long title parameter in conjunction with a charset parameter composed of many comma-separated "UTF-8" substrings, related to the mb_convert_encoding function in PHP.
How severe is CVE-2009-3622?: CVE-2009-3622 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-3622 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3622?: CVE-2009-3622 affects Wordpress. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-3622?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3622 published?: CVE-2009-3622 was published on 2009-10-23 and last updated on 2026-06-16.

References

Affected products (1)

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

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