CVE-2016-9849
It is possible to bypass AllowRoot restriction ($cfg['Servers'][$i]['AllowRoot']) and deny rules for username by using Null Byte in the username.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.67%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.67% probability · 86th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- phpmyadmin/phpmyadmin
- Source
- cve@mitre.org
EPSS 2.7% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/94521Third Party Advisory, VDB 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-2016-60Patch, Vendor Advisory
- http://www.securityfocus.com/bid/94521Third Party Advisory, VDB 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-2016-60Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.