CVE-2009-4449

Name: CVE-2009-4449
Creator: NVD / NIST
Published: 2009-12-29T20:41:20.5+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.70%

Last modified Jun 16, 2026

CVE-2009-4449 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 2.70% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

2.70%

84.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Mybb	Mybb	1.4.10

References

http://blog.mybboard.net/2009/12/29/mybb-1-4-11-released-minor-patch-security-update/Release Notes
http://dev.mybboard.net/issues/617Broken Link
http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/admin/modules/user/users.phpBroken Link, Exploit
http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/usercp.phpBroken Link, Exploit
http://openwall.com/lists/oss-security/2010/10/08/7Mailing List
http://openwall.com/lists/oss-security/2010/10/11/8Mailing List
http://openwall.com/lists/oss-security/2010/12/06/2Mailing List
http://osvdb.org/61359Broken Link
http://secunia.com/advisories/37906Broken Link, Vendor Advisory
http://www.securityfocus.com/bid/37489Broken Link, Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2009/3651Permissions Required, Vendor Advisory
http://blog.mybboard.net/2009/12/29/mybb-1-4-11-released-minor-patch-security-update/Release Notes
http://dev.mybboard.net/issues/617Broken Link
http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/admin/modules/user/users.phpBroken Link, Exploit
http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/usercp.phpBroken Link, Exploit
http://openwall.com/lists/oss-security/2010/10/08/7Mailing List
http://openwall.com/lists/oss-security/2010/10/11/8Mailing List
http://openwall.com/lists/oss-security/2010/12/06/2Mailing List
http://osvdb.org/61359Broken Link
http://secunia.com/advisories/37906Broken Link, Vendor Advisory
http://www.securityfocus.com/bid/37489Broken Link, Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2009/3651Permissions Required, Vendor Advisory

Timeline

Published: Dec 29, 2009
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-4449?

How severe is CVE-2009-4449?

CVE-2009-4449 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.70% probability of exploitation in the next 30 days.

How do I fix CVE-2009-4449?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-4449?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST