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    CVE-2009-4449

    Directory traversal vulnerability in MyBB (aka MyBulletinBoard) 1.4.10, and possibly earlier versions, when changing the user avatar from the gallery, allows remote authenticated users to determine the existence of files via directory traversal sequences in the avatar and possibly the gallery parameters, related to (1) admin/modules/user/users.php and (2) usercp.php.

    Published:Dec 29, 2009
    Last Modified:Apr 23, 2026
    EPS:Dec 29, 2009
    EPSS Score:0.00501
    CVSS Score:6.5

    Affected Products

    Vendor
    Mybb
    Product
    Mybb

    Exploits

    http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/admin/modules/user/users.phphttp://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/usercp.phphttp://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/admin/modules/user/users.phphttp://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/usercp.php

    Related CVEs

    CVE-2026-45118 (CVSS 9.3) — MyBB is free and open source forum software. Prior to 1.8.40, the Contact module does not validate a redirect …
    CVE-2026-45117 (CVSS 9.8) — MyBB is free and open source forum software. From 1.8.13 until 1.8.40, the installer module does not properly …
    CVE-2026-45129 (CVSS 4.6) — MyBB is free and open source forum software. Prior to 1.8.40, the Admin CP Recovery Codes module does not vali…
    CVE-2026-45124 (CVSS 4.3) — MyBB is free and open source forum software. Prior to 1.8.40, the Mod CP Report Center does not check permissi…
    CVE-2026-45120 (CVSS 5.4) — MyBB is free and open source forum software. Prior to 1.8.40, the calendar module does not verify private even…
    CVE-2026-47245 (CVSS 4.3) — MyBB is free and open source forum software. Prior to 1.8.40, the User CP Buddy/Ignore List component does not…
    CVE-2026-45734 (CVSS 5.3) — MyBB is free and open source forum software. Prior to 1.8.40, the built-in CAPTCHA does not consistently enfor…
    CVE-2026-45125 (CVSS 5.3) — MyBB is free and open source forum software. Prior to 1.8.40, the Email User controller does not sanitize send…
    CVE-2026-45122 (CVSS 4.3) — MyBB is free and open source forum software. Prior to 1.8.40, the calendar module does not validate moderation…
    CVE-2026-45119 (CVSS 4.6) — MyBB is free and open source forum software. Prior to 1.8.40, the Admin CP UTF-8 Conversion module does not va…

    References

    http://blog.mybboard.net/2009/12/29/mybb-1-4-11-released-minor-patch-security-update/
    http://dev.mybboard.net/issues/617
    http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/admin/modules/user/users.php
    http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/usercp.php
    http://openwall.com/lists/oss-security/2010/10/08/7
    http://openwall.com/lists/oss-security/2010/10/11/8
    http://openwall.com/lists/oss-security/2010/12/06/2
    http://osvdb.org/61359
    http://secunia.com/advisories/37906
    http://www.securityfocus.com/bid/37489
    http://www.vupen.com/english/advisories/2009/3651
    http://blog.mybboard.net/2009/12/29/mybb-1-4-11-released-minor-patch-security-update/
    http://dev.mybboard.net/issues/617
    http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/admin/modules/user/users.php
    http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/usercp.php
    http://openwall.com/lists/oss-security/2010/10/08/7
    http://openwall.com/lists/oss-security/2010/10/11/8
    http://openwall.com/lists/oss-security/2010/12/06/2
    http://osvdb.org/61359
    http://secunia.com/advisories/37906
    http://www.securityfocus.com/bid/37489
    http://www.vupen.com/english/advisories/2009/3651

    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