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CVE-2016-6622

phpMyAdmin DoS Vulnerability

5.9 MediumFix available

CVE-2016-6622 is a medium vulnerability (CVSS 5.9) in Phpmyadmin, published August 31, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.80%, the 78th percentile. Fixed in phpmyadmin/phpmyadmin 4.6.4.

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.80%Up 0.8 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.9

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Record
CVE-2016-6622
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness
CWE-399
Updated
2026-11-02
CVE List No score

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Record
CVE-2016-6622
Updated
2026-11-02
EUVDEUVD-2022-4955 No score

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Record
EUVD-2022-4955
Updated
2026-11-03
GitHub AdvisoriesGHSA-qf3f-7x69-qfv3 5.9

phpMyAdmin DoS Vulnerability

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Record
GHSA-qf3f-7x69-qfv3
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVALPINE-CVE-2016-6622 5.9

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Record
ALPINE-CVE-2016-6622
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 5.9

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Record
CVE-2016-6622
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 5 moreShow less
OSVDEBIAN-CVE-2016-6622 5.9

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Record
DEBIAN-CVE-2016-6622
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGHSA-qf3f-7x69-qfv3 5.9

phpMyAdmin DoS Vulnerability

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Record
GHSA-qf3f-7x69-qfv3
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2016-6622 5.9

An issue was discovered in phpMyAdmin. An unauthenticated user is able to execute a denial-of-service (DoS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

Record
UBUNTU-CVE-2016-6622
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2016-0291 No score

Updated phpmyadmin packages fix security vulnerability

In phpMyAdmin before 4.4.15.8, the decryption of the username/password is vulnerable to a padding oracle attack. The can allow an attacker who has access to a user's browser cookie file to decrypt the username and password. Also, the same initialization vector (IV) is used to hash the username and password stored in the phpMyAdmin cookie. If a user has the same password as their username, an attacker who examines the browser cookie can see that they are the same (CVE-2016-6606).

In phpMyAdmin before 4.4.15.8, multiple vulnerabilities have been discovered in the following areas of phpMyAdmin: Zoom search, GIS editor, Relation view, several Transformations, XML export, MediaWiki export, Designer, when the MySQL server is running with a specially-crafted log_bin directive, Database tab, Replication feature, and Database search (CVE-2016-6607).

In phpMyAdmin before 4.4.15.8, a vulnerability was found where a specially crafted database name could be used to run arbitrary PHP commands through the array export feature (CVE-2016-6609).

In phpMyAdmin before 4.4.15.8, a full path disclosure vulnerability was discovered where a user can trigger a particular error in the export mechanism to discover the full path of phpMyAdmin on the disk (CVE-2016-6610).

In phpMyAdmin before 4.4.15.8, a vulnerability was reported where a specially crafted database and/or table name can be used to trigger an SQL injection attack through the export functionality (CVE-2016-6611).

In phpMyAdmin before 4.4.15.8, a vulnerability was discovered where a user can exploit the LOAD LOCAL INFILE functionality to expose files on the server to the database system (CVE-2016-6612).

In phpMyAdmin before 4.4.15.8, a vulnerability was found where a user can specially craft a symlink on disk, to a file which phpMyAdmin is permitted to read but the user is not, which phpMyAdmin will then expose to the user (CVE-2016-6613).

In phpMyAdmin before 4.4.15.8, a vulnerability was reported with the %u username replacement functionality of the SaveDir and UploadDir features. When the username substitution is configured, a specially-crafted user name can be used to circumvent restrictions to traverse the file system (CVE-2016-6614).

In phpMyAdmin before 4.4.15.8, multiple XSS vulnerabilities were found in the following areas: Navigation pane and database/table hiding feature, the "Tracking" feature, and GIS visualization feature (CVE-2016-6615).

In phpMyAdmin before 4.4.15.8, a vulnerability was discovered in the following features where a user can execute an SQL injection attack against the account of the control user: User group Designer (CVE-2016-6616).

In phpMyAdmin before 4.4.15.8, a vulnerability was found in the transformation feature allowing a user to trigger a denial-of-service (DOS) attack against the server (CVE-2016-6618).

In phpMyAdmin before 4.4.15.8, a vulnerability was discovered in the user interface preference feature where a user can execute an SQL injection attack against the account of the control user (CVE-2016-6619).

In phpMyAdmin before 4.4.15.8, a vulnerability was reported where some data is passed to the PHP unserialize() function without verification that it's valid serialized data. A malicious user may be able to manipulate the stored data in a way to result in code being loaded and executed (CVE-2016-6620).

In phpMyAdmin before 4.4.15.8, a vulnerability was discovered where an unauthenticated user is able to execute a denial-of-service (DOS) attack by forcing persistent connections when phpMyAdmin is running with $cfg['AllowArbitraryServer']=true; (CVE-2016-6622).

In phpMyAdmin before 4.4.15.8, a vulnerability has been reported where a malicious authorized user can cause a denial-of-service (DOS) attack on a server by passing large values to a loop (CVE-2016-6623).

In phpMyAdmin before 4.4.15.8, a vulnerability was discovered where, under certain circumstances, it may be possible to circumvent the phpMyAdmin IP-based authentication…

Record
MGASA-2016-0291
Updated
2026-11-02
OSVopenSUSE-SU-2024:10054-1 No score

phpMyAdmin-4.6.5.2-1.1 on GA media

These are all security issues fixed in the phpMyAdmin-4.6.5.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10054-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
phpmyadmin/phpmyadmin
Packagist
4.6 up to 4.6.4
4.6.4
phpmyadmin/phpmyadmin
Packagist
4.4 up to 4.4.15.8
4.4.15.8
phpmyadmin/phpmyadmin
Packagist
4.0 up to 4.0.10.17
4.0.10.17
phpmyadmin
Alpine:v3.2
before 4.4.15.8-r0
4.4.15.8-r0
phpmyadmin
Debian:12
before 4:4.6.4+dfsg1-1
4:4.6.4+dfsg1-1
phpmyadmin
Debian:13
before 4:4.6.4+dfsg1-1
4:4.6.4+dfsg1-1
phpmyadmin
Debian:14
before 4:4.6.4+dfsg1-1
4:4.6.4+dfsg1-1
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
Debian:7
before 4:3.4.11.1-2+deb7u6, plus listed versions
4:3.4.11.1-24:3.4.11.1-2+deb7u14:3.4.11.1-2+deb7u24:3.4.11.1-2+deb7u34:3.4.11.1-2+deb7u44:3.4.11.1-2+deb7u5
4:3.4.11.1-2+deb7u6
phpmyadmin/phpmyadmin
Packagist
4.0 up to 4.0.10.17, 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
4.0.10.17
Show 4 moreShow less
Affected packages
PackageAffectedFixed
phpmyadmin
Mageia:5
before 4.4.15.8-1.mga5
4.4.15.8-1.mga5
phpmyadmin
Ubuntu:Pro:14.04:LTS
All versions, plus listed versions
4:4.0.6-14:4.0.8-14:4.0.9-14:4.0.10-14:4.0.10-1ubuntu0.1
Show 4 moreShow less
4:4.0.10-1ubuntu0.1+esm14:4.0.10-1ubuntu0.1+esm24:4.0.10-1ubuntu0.1+esm34:4.0.10-1ubuntu0.1+esm4
None known
phpmyadmin
Ubuntu:Pro:16.04:LTS
All versions, 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 13 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+esm54:4.5.4.1-2ubuntu2.1+esm6
None known
phpMyAdmin
openSUSE:Tumbleweed
before 4.6.5.2-1.1
4.6.5.2-1.1

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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