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    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.

    Published:Oct 20, 2009
    Last Modified:Apr 23, 2026
    EPS:Oct 23, 2009
    EPSS Score:0.08278
    CVSS Score:4.3

    Affected Products

    Vendor
    Wordpress
    Product
    Wordpress

    Exploits

    http://rooibo.wordpress.com/2009/10/17/agujero-de-seguridad-en-wordpress/http://seclists.org/fulldisclosure/2009/Oct/263http://rooibo.wordpress.com/2009/10/17/agujero-de-seguridad-en-wordpress/http://seclists.org/fulldisclosure/2009/Oct/263

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-77807 (CVSS 7.5) — The AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress plugin for Word…
    CVE-2026-84821 (CVSS 7.5) — Unauthenticated Broken Access Control in WP Fast Total Search <= 1.82.284 versions.…
    CVE-2026-84819 (CVSS 7.1) — Unauthenticated Cross Site Scripting (XSS) in WPAdverts <= 2.3.3 versions.…
    CVE-2026-84816 (CVSS 7.1) — Unauthenticated Cross Site Scripting (XSS) in WPCS <= 1.3.2 versions.…
    CVE-2026-81803 (CVSS 7.5) — Subscriber Remote Code Execution (RCE) in RepairBuddy <= 4.1224 versions.…
    CVE-2026-81799 (CVSS 7.5) — Unauthenticated Broken Access Control in Return Refund and Exchange For WooCommerce <= 4.6.4 versions.…
    CVE-2026-81796 (CVSS 7.3) — Unauthenticated Broken Authentication in WP Travel <= 12.0.3 versions.…
    CVE-2026-81793 (CVSS 6.5) — Unauthenticated Broken Access Control in Salon booking system <= 10.31.5 versions.…
    CVE-2026-81788 (CVSS 6.3) — Subscriber Broken Access Control in IMPress for IDX Broker <= 3.3.0 versions.…
    CVE-2026-81787 (CVSS 6.5) — Unauthenticated Broken Authentication in IMPress for IDX Broker <= 3.3.0 versions.…

    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
    https://exchange.xforce.ibmcloud.com/vulnerabilities/53884
    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
    https://exchange.xforce.ibmcloud.com/vulnerabilities/53884

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High