Is CVE-2009-3622 being actively exploited?

CVE-2009-3622 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-3622?

CVE-2009-3622 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2009-3622

MEDIUM · CVSS 4.3EPSS 5.8%EU EUVD

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.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-310
EPSS score: 5.8% (93th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-3603)
Published: October 23, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-3603 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

wordpress / wordpress

References

http://codes.zerial.org/php/wp-trackbacks_dos.phps(Broken Link)
http://marc.info/?l=oss-security&m=125612393329041&w=2(Mailing List, Third Party Advisory)
http://marc.info/?l=oss-security&m=125614592004825&w=2(Mailing List, Third Party Advisory)
http://rooibo.wordpress.com/2009/10/17/agujero-de-seguridad-en-wordpress/(Exploit, Issue Tracking, Vendor Advisory)
http://seclists.org/fulldisclosure/2009/Oct/263(Exploit, Mailing List, Third Party Advisory)
http://secunia.com/advisories/37088(Third Party Advisory)
http://security-sh3ll.blogspot.com/2009/10/wordpress-resource-exhaustion-denial-of.html(Third Party Advisory)
http://securitytracker.com/id?1023072(Third Party Advisory, VDB Entry)
http://wordpress.org/development/2009/10/wordpress-2-8-5-hardening-release/(Vendor Advisory)
http://www.osvdb.org/59077(Broken Link)
http://www.vupen.com/english/advisories/2009/2986(Patch, Vendor Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=530056(Issue Tracking)
https://exchange.xforce.ibmcloud.com/vulnerabilities/53884(Third Party Advisory, VDB Entry)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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