CVE-2011-4957

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    CVE-2011-4957

    Published: 27 Jun 2012Last Modified: 10 Apr 2026

    Summary:

    Details: The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.

    References: http://secunia.com/advisories/44038, http://secunia.com/advisories/49138, http://www.debian.org/security/2012/dsa-2470, http://core.trac.wordpress.org/ticket/16892, http://wordpress.org/news/2011/04/wordpress-3-1-1/, http://www.openwall.com/lists/oss-security/2012/04/19/17, http://www.openwall.com/lists/oss-security/2012/04/19/6

    Affected packages

    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
    CVE-2011-4957 | CVE-DB