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CVE-2017-18264

phpMyAdmin Improper Privilege Management

9.8 CriticalFix available

CVE-2017-18264 is a critical vulnerability (CVSS 9.8) in Phpmyadmin, published May 1, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.82%, the 86th percentile. Fixed in phpmyadmin/phpmyadmin 4.0.10.20.

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.82%Up 2.0 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Record
CVE-2017-18264
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated
2026-11-02
CVE List No score

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Record
CVE-2017-18264
Updated
2026-11-02
EUVDEUVD-2022-2531 No score

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Record
EUVD-2022-2531
Updated
2026-11-03
GitHub AdvisoriesGHSA-5868-g58j-vrj5 9.8

phpMyAdmin Improper Privilege Management

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Record
GHSA-5868-g58j-vrj5
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-269
Updated
2026-11-02
OSV 9.8

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Record
CVE-2017-18264
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2017-18264 9.8

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Record
DEBIAN-CVE-2017-18264
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGHSA-5868-g58j-vrj5 9.8

phpMyAdmin Improper Privilege Management

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Record
GHSA-5868-g58j-vrj5
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-269
Updated
2026-11-02
OSVUBUNTU-CVE-2017-18264 9.8

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Record
UBUNTU-CVE-2017-18264
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUSN-4843-1 No score

phpmyadmin vulnerabilities

Javier Nieto and Andres Rojas discovered that phpMyAdmin incorrectly managed input in the form of passwords. An attacker could use this vulnerability to cause a denial-of-service (DoS). This issue only affected Ubuntu 14.04 ESM. (CVE-2014-9218)

Emanuel Bronshtein discovered that phpMyAdmin failed to properly sanitize input in the form of database names in the PHP Array export feature. An authenticated attacker could use this vulnerability to run arbitrary PHP commands. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2016-6609)

Emanuel Bronshtein discovered that phpMyAdmin failed to properly sanitize input. An attacker could use this vulnerability to execute SQL injection attacks. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2016-6619)

Emanuel Bronshtein discovered that phpMyadmin failed to properly sanitize input. An authenticated attacker could use this vulnerability to cause a denial-of-service (DoS). This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2016-6630)

Emanuel Bronshtein discovered that phpMyAdmin failed to properly sanitize input. An attacker could use this vulnerability to bypass AllowRoot restrictions and deny rules for usernames. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2016-9849)

Emanuel Bronshtein discovered that phpMyAdmin would allow sensitive information to be leaked when the argument separator in a URL was not the default & value. An attacker could use this vulnerability to obtain the CSRF token of a user. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2016-9866)

Isaac Bennetch discovered that phpMyAdmin was incorrectly restricting user access due to the behavior of the substr function on some PHP versions. An attacker could use this vulnerability to bypass login restrictions established for users that have no password set. This issue only affected Ubuntu 14.04 ESM. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2017-18264)

Emanuel Bronshtein discovered that phpMyAdmin failed to properly sanitize input in the form of parameters sent during a table editing operation. An attacker could use this vulnerability to trigger an endless recursion and cause a denial-of-service (DoS). This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2017-1000014)

Emanuel Bronshtein discovered that phpMyAdmin failed to properly sanitize input used to generate a web page. An authenticated attacker could use this vulnerability to execute CSS injection attacks. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2017-1000015)

It was discovered that phpMyAdmin incorrectly handled certain input. An attacker could use this vulnerability to execute a cross-site scripting (XSS) attack via a crafted URL. This issue only affected Ubuntu 16.04 ESM. (CVE-2018-7260)

It was discovered phpMyAdmin incorrectly handled database names. An attacker could possibly use this to trigger a cross-site scripting attack. This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2018-12581)

Daniel Le Gall discovered that phpMyAdmin would expose sensitive information to unauthorized actors due to an error in its transformation feature. An authenticated attacker could use this vulnerability to leak the contents of a local file. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2018-19968)

It was discovered that phpMyAdmin incorrectly handled user input. An attacker could possibly use this to perform a cross-site scripting attack. This issue only affected Ubuntu 16.04 ESM. (CVE-2018-19970)

It was discovered that phpMyAdmin failed to properly sanitize input. An attacker could use this vulnerability to execute an SQL injection attack via a specially crafted database name. This issue only affected Ubuntu 16.04 ESM. (CVE-2019-11768)

It was discovered that phpMyAdmin incorrectly handled some requests. An attacker could possibly use this to perform a cross…

Record
USN-4843-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
phpmyadmin/phpmyadmin
Packagist
4.0 up to 4.0.10.20
4.0.10.20
phpmyadmin/phpmyadmin
Packagist
4.7.0-beta1 up to 4.7.0
4.7.0
phpmyadmin/phpmyadmin
Packagist
4.4.0 to 4.4.15.10 None known
phpmyadmin/phpmyadmin
Packagist
4.6.0 to 4.6.6 None known
phpmyadmin
Debian:12
before 4:4.6.6-2
4:4.6.6-2
phpmyadmin
Debian:13
before 4:4.6.6-2
4:4.6.6-2
phpmyadmin
Debian:14
before 4:4.6.6-2
4:4.6.6-2
phpmyadmin
Debian:8
before 4:4.2.12-2+deb8u3, plus listed versions
4:4.2.12-24:4.2.12-2+deb8u14:4.2.12-2+deb8u2
4:4.2.12-2+deb8u3
phpmyadmin/phpmyadmin
Packagist
4.0 up to 4.0.10.20, plus listed versions
4.0.04.0.14.0.104.0.10.14.0.10.2
Show 17 moreShow less
4.0.10.34.0.10.44.0.10.54.0.10.64.0.10.74.0.10.84.0.10.94.0.24.0.34.0.44.0.4.14.0.4.24.0.54.0.64.0.74.0.84.0.9
4.0.10.20
phpmyadmin
Ubuntu:Pro:14.04:LTS
before 4:4.0.10-1ubuntu0.1+esm4, plus listed versions
4:4.0.6-14:4.0.8-14:4.0.9-14:4.0.10-14:4.0.10-1ubuntu0.14:4.0.10-1ubuntu0.1+esm14:4.0.10-1ubuntu0.1+esm24:4.0.10-1ubuntu0.1+esm3
4:4.0.10-1ubuntu0.1+esm4
Show 4 moreShow less
Affected packages
PackageAffectedFixed
phpmyadmin
Ubuntu:Pro:16.04:LTS
before 4:4.5.4.1-2ubuntu2.1+esm3, plus listed versions
4:4.4.13.1-14:4.5.0.2-24:4.5.1-14:4.5.1-24:4.5.1-3
Show 9 moreShow less
4:4.5.2-14:4.5.2-24:4.5.3.1-14:4.5.4-14:4.5.4.1-24:4.5.4.1-2ubuntu14:4.5.4.1-2ubuntu24:4.5.4.1-2ubuntu2.14:4.5.4.1-2ubuntu2.1+esm2
4:4.5.4.1-2ubuntu2.1+esm3
phpmyadmin
Ubuntu:Pro:16.04:LTS
before 4:4.5.4.1-2ubuntu2.1+esm6, plus listed versions
4:4.4.13.1-14:4.5.0.2-24:4.5.1-14:4.5.1-24:4.5.1-3
Show 12 moreShow less
4:4.5.2-14:4.5.2-24:4.5.3.1-14:4.5.4-14:4.5.4.1-24:4.5.4.1-2ubuntu14:4.5.4.1-2ubuntu24:4.5.4.1-2ubuntu2.14:4.5.4.1-2ubuntu2.1+esm24:4.5.4.1-2ubuntu2.1+esm34:4.5.4.1-2ubuntu2.1+esm44:4.5.4.1-2ubuntu2.1+esm5
4:4.5.4.1-2ubuntu2.1+esm6
phpmyadmin
Ubuntu:Pro:18.04:LTS
before 4:4.6.6-5ubuntu0.5+esm1, plus listed versions
4:4.6.6-54:4.6.6-5ubuntu0.2+esm14:4.6.6-5ubuntu0.2+esm24:4.6.6-5ubuntu0.5
4:4.6.6-5ubuntu0.5+esm1
phpmyadmin
Ubuntu:Pro:20.04:LTS
before 4:4.9.5+dfsg1-2ubuntu0.1~esm1, plus listed versions
4:4.9.1+dfsg1-24:4.9.2+dfsg1-14:4.9.5+dfsg1-1ubuntu14:4.9.5+dfsg1-2
4:4.9.5+dfsg1-2ubuntu0.1~esm1

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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Left out here: the rest of 1 source description. The JSON record has them.

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