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All vulnerabilities

WordPress core

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.

Severity
Medium 4.3
Published
23 Oct 2009
Last changed
16 Jun 2026
Added to UpHeron
17 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
WordPressWordPress core · cpe:a:wordpress:wordpress
  • Every version up to 2.8.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-3622
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-3622