UpHeron
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Servers and applications

CVE-2016-9847

An issue was discovered in phpMyAdmin. When the user does not specify a blowfish_secret key for encrypting cookies, phpMyAdmin generates one at runtime. A vulnerability was reported where the way this value is created uses a weak algorithm. This could allow an attacker to determine the user's blowfish_secret and potentially decrypt their cookies. All 4.6.x versions (prior to 4.6.5), 4.4.x…

Severity
Medium 5.3
Published
11 Dec 2016
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
2% in the next 30 daysHigher than 81% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
CWE-310
Attack
Over the network · No login needed · No user action needed
Attacker can
Read some data
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Sources
NVD

Description

An issue was discovered in phpMyAdmin. When the user does not specify a blowfish_secret key for encrypting cookies, phpMyAdmin generates one at runtime. A vulnerability was reported where the way this value is created uses a weak algorithm. This could allow an attacker to determine the user's blowfish_secret and potentially decrypt their cookies. 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.

From NVD.

Affected software

SoftwareAffected versions
phpMyAdminServers and applications · cpe:a:phpmyadmin:phpmyadmin
  • Version 4.6.4
  • Version 4.6.3
  • Version 4.6.2
  • Version 4.6.1
All 63 release lines
  • Version 4.0.0
  • Version 4.0.1
  • Version 4.0.2
  • Version 4.0.3
  • Version 4.0.4
  • Version 4.0.4.1
  • Version 4.0.4.2
  • Version 4.0.5
  • Version 4.0.6
  • Version 4.0.7
  • Version 4.0.8
  • Version 4.0.9
  • Version 4.0.10
  • Version 4.0.10.1
  • Version 4.0.10.2
  • Version 4.0.10.3
  • Version 4.0.10.4
  • Version 4.0.10.5
  • Version 4.0.10.6
  • Version 4.0.10.7
  • Version 4.0.10.8
  • Version 4.0.10.9
  • Version 4.0.10.10
  • Version 4.0.10.11
  • Version 4.0.10.12
  • Version 4.0.10.13
  • Version 4.0.10.14
  • Version 4.0.10.15
  • Version 4.0.10.16
  • Version 4.0.10.17
  • Version 4.4.0
  • Version 4.4.1
  • Version 4.4.1.1
  • Version 4.4.2
  • Version 4.4.3
  • Version 4.4.4
  • Version 4.4.5
  • Version 4.4.6
  • Version 4.4.6.1
  • Version 4.4.7
  • Version 4.4.8
  • Version 4.4.9
  • Version 4.4.10
  • Version 4.4.11
  • Version 4.4.12
  • Version 4.4.13
  • Version 4.4.13.1
  • Version 4.4.14
  • Version 4.4.14.1
  • Version 4.4.15
  • Version 4.4.15.1
  • Version 4.4.15.2
  • Version 4.4.15.3
  • Version 4.4.15.4
  • Version 4.4.15.5
  • Version 4.4.15.6
  • Version 4.4.15.7
  • Version 4.4.15.8
  • Version 4.6.0
  • Version 4.6.1
  • Version 4.6.2
  • Version 4.6.3
  • Version 4.6.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-9847
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-9847