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Vulnerability record · CVE-2009-3622 · published 23 October 2009

CVE-2009-3622: Wordpress vulnerability

Wordpress · Wordpress

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.

4.3 CVSS 2.0 Medium EPSS 5.8% · top 7.1% CWE-310 · CWE-310
4.3CVSS 2.0 base score
5.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
26References, 4 tagged exploit
16 Jun 2026Last modified by NVD

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.

AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://codes.zerial.org/php/wp-trackbacks_dos.phps Broken Link
http://marc.info/?l=oss-security&m=125612393329041&w=2 Mailing ListThird Party Advisory
http://marc.info/?l=oss-security&m=125614592004825&w=2 Mailing ListThird Party Advisory
http://rooibo.wordpress.com/2009/10/17/agujero-de-seguridad-en-wordpress/ ExploitIssue TrackingVendor Advisory
http://seclists.org/fulldisclosure/2009/Oct/263 ExploitMailing ListThird 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 AdvisoryVDB 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 PatchVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=530056 Issue Tracking
https://exchange.xforce.ibmcloud.com/vulnerabilities/53884 Third Party AdvisoryVDB Entry
http://codes.zerial.org/php/wp-trackbacks_dos.phps Broken Link
http://marc.info/?l=oss-security&m=125612393329041&w=2 Mailing ListThird Party Advisory
http://marc.info/?l=oss-security&m=125614592004825&w=2 Mailing ListThird Party Advisory
http://rooibo.wordpress.com/2009/10/17/agujero-de-seguridad-en-wordpress/ ExploitIssue TrackingVendor Advisory
http://seclists.org/fulldisclosure/2009/Oct/263 ExploitMailing ListThird 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 AdvisoryVDB 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 PatchVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=530056 Issue Tracking
https://exchange.xforce.ibmcloud.com/vulnerabilities/53884 Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-3622), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.