CVE-2009-3622

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-10-23 · updated 2026-06-16
Weakness: CWE-310

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.

Affected products

WordPress: through 2.8.4

References

http://codes.zerial.org/php/wp-trackbacks_dos.phps
http://marc.info/?l=oss-security&m=125612393329041&w=2
http://marc.info/?l=oss-security&m=125614592004825&w=2
http://rooibo.wordpress.com/2009/10/17/agujero-de-seguridad-en-wordpress/
http://seclists.org/fulldisclosure/2009/Oct/263
http://secunia.com/advisories/37088
http://security-sh3ll.blogspot.com/2009/10/wordpress-resource-exhaustion-denial-of.html
http://securitytracker.com/id?1023072
http://wordpress.org/development/2009/10/wordpress-2-8-5-hardening-release/
http://www.osvdb.org/59077
http://www.vupen.com/english/advisories/2009/2986
https://bugzilla.redhat.com/show_bug.cgi?id=530056

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