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 versions (prior to 4.4.15.9), and 4.0.x versions (prior to 4.0.10.18) are affected.

Published: 2016-12-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-9847 is rated Moderate Risk (50.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.00%). EPSS rose +1.57% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-9847

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.43% 2.00% +1.57%
2 2025-07-30 0.46% 0.43% -0.03%
3 2025-03-30 — 0.46% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-9847

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-9847

GitHub Security Advisory for CVE-2016-9847

GHSA-9xhq-pm7v-693p · Severity: medium · Ecosystem: composer — phpMyAdmin Cryptographic Vulnerability

OS Trackers for CVE-2016-9847

vendor priority summary link
alpine — CVE-2016-9847: 1 source package rows (phpmyadmin); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2016-9847
debian unimportant CVE-2016-9847 unimportant priority: Debian including 1 source packages (phpmyadmin), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2016-9847
gentoo normal CVE-2016-9847: 1 GLSA(s) (201701-32), 1 atom(s) (dev-db/phpmyadmin); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-9847
ubuntu medium CVE-2016-9847 medium priority: Ubuntu including 1 source packages (phpmyadmin), 23 status rows across 23 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, xenial, yakkety, zesty): not-affected 15, ignored 4, needed 2, DNE 1, released 1. https://ubuntu.com/security/CVE-2016-9847

Affected software / configurations for CVE-2016-9847

Vendor Product Version Raw CPE
phpmyadmin phpmyadmin 4.6.0 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.0:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.6.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.6.2 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.2:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.6.3 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.3:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.6.4 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.4:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.0 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.0:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.2 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.2:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.3 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.3:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.4 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.4:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.4.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.4.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.4.2 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.4.2:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.5 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.5:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.6 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.6:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.7 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.7:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.8 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.8:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.9 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.9:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.2 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.2:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.3 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.3:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.4 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.4:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.5 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.5:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.6 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.6:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.7 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.7:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.8 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.8:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.9 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.9:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.10 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.10:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.11 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.11:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.12 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.12:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.13 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.13:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.14 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.14:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.15 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.15:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.16 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.16:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.0.10.17 cpe:2.3:a:phpmyadmin:phpmyadmin:4.0.10.17:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.0 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.0:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.1.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.1.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.2 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.2:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.3 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.3:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.4 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.4:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.5 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.5:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.6 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.6:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.6.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.6.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.7 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.7:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.8 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.8:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.9 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.9:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.10 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.10:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.11 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.11:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.12 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.12:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.13 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.13:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.13.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.13.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.14 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.14:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.14.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.14.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.15 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.15:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.15.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.15.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.15.2 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.15.2:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.15.3 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.15.3:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.15.4 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.15.4:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.15.5 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.15.5:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.15.6 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.15.6:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.15.7 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.15.7:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.4.15.8 cpe:2.3:a:phpmyadmin:phpmyadmin:4.4.15.8:*:*:*:*:*:*:*

References for CVE-2016-9847

cvelogic Threat Intelligence