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Vulnerability record · CVE-2016-9849 · published 11 December 2016

CVE-2016-9849: Phpmyadmin permissions and access controls vulnerability

Phpmyadmin · Phpmyadmin

An issue was discovered in phpMyAdmin. It is possible to bypass AllowRoot restriction ($cfg['Servers'][$i]['AllowRoot']) and deny rules for username by using Null Byte in the username. All 4.6.x versions (prior to 4.6.5), 4.4.x versions (prior to 4.4.15.9), and 4.0.x versions (prior to 4.0.10.18) are affected.

9.8 CVSS 3.0 Critical EPSS 2.0% · top 20.4% CWE-264 · Permissions and access controls
9.8CVSS 3.0 base score, v2 7.5
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in phpMyAdmin. It is possible to bypass AllowRoot restriction ($cfg['Servers'][$i]['AllowRoot']) and deny rules for username by using Null Byte in the username. All 4.6.x versions (prior to 4.6.5), 4.4.x versions (prior to 4.4.15.9), and 4.0.x versions (prior to 4.0.10.18) are affected.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
http://www.securityfocus.com/bid/94521 Third Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2019/06/msg00009.html
https://security.gentoo.org/glsa/201701-32
https://www.phpmyadmin.net/security/PMASA-2016-60 PatchVendor Advisory
http://www.securityfocus.com/bid/94521 Third Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2019/06/msg00009.html
https://security.gentoo.org/glsa/201701-32
https://www.phpmyadmin.net/security/PMASA-2016-60 PatchVendor Advisory

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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-2016-9849), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.