Is CVE-2009-4449 being actively exploited?

CVE-2009-4449 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-4449?

CVE-2009-4449 has a CVSS 3.1 base score of 6.5 (MEDIUM).

CVE-2009-4449

MEDIUM · CVSS 6.5EPSS 2.7%EU EUVD

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.

Key facts

CVSS score: 6.5 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-22
EPSS score: 2.7% (86th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-4416)
Published: December 29, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-4416 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

mybb / mybb

References

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

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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