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Vulnerability record · CVE-2015-4499 · published 14 September 2015

CVE-2015-4499: Mozilla bugzilla improper input validation vulnerability

Mozilla · Bugzilla

Util.pm in Bugzilla 2.x, 3.x, and 4.x before 4.2.15, 4.3.x and 4.4.x before 4.4.10, and 5.x before 5.0.1 mishandles long e-mail addresses during account registration, which allows remote attackers to obtain the default privileges for an arbitrary domain name by placing that name in a substring of an address, as demonstrated by truncation of an @mozilla.com.example.com address to an @mozilla.com address.

7.5 CVSS 2.0 High EPSS 3.4% · top 11.7% CWE-20 · Improper input validation
7.5CVSS 2.0 base score
3.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Util.pm in Bugzilla 2.x, 3.x, and 4.x before 4.2.15, 4.3.x and 4.4.x before 4.4.10, and 5.x before 5.0.1 mishandles long e-mail addresses during account registration, which allows remote attackers to obtain the default privileges for an arbitrary domain name by placing that name in a substring of an address, as demonstrated by truncation of an @mozilla.com.example.com address to an @mozilla.com address.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168725.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169946.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169983.html
http://packetstormsecurity.com/files/133578/Bugzilla-Unauthorized-Account-Creation.html
http://seclists.org/bugtraq/2015/Sep/48 Patch
http://seclists.org/bugtraq/2015/Sep/49 Patch
http://www.securitytracker.com/id/1033542
https://bug1202447.bmoattachments.org/attachment.cgi?id=8657861
https://bugzilla.mozilla.org/show_bug.cgi?id=1202447 Exploit
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168725.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169946.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169983.html
http://packetstormsecurity.com/files/133578/Bugzilla-Unauthorized-Account-Creation.html
http://seclists.org/bugtraq/2015/Sep/48 Patch
http://seclists.org/bugtraq/2015/Sep/49 Patch
http://www.securitytracker.com/id/1033542
https://bug1202447.bmoattachments.org/attachment.cgi?id=8657861
https://bugzilla.mozilla.org/show_bug.cgi?id=1202447 Exploit

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2015-4499), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.