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Fencer Intel
critical 9.8

CVE-2016-9866 json

phpMyAdmin CSRF Vulnerability

published 2016-12-11 9 y ago modified 2026-06-17 4 mo ago also GHSA-jvxx-8xxf-5495 , EUVD-2022-4439

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

An issue was discovered in phpMyAdmin. When the arg_separator is different from its default & value, the CSRF token was not properly stripped from the return URL of the preference import action. 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.

Patch / fix

  • packagist phpmyadmin/phpmyadmin 4.0.10.18, 4.4.15.9, 4.6.5
  • phpmyadmin Debian 14, Debian 13, Debian 12 4:4.6.5.1-1

debian advisories DEBIAN-CVE-2016-9866

  • phpmyadmin Ubuntu Pro 14.04 LTS 4:4.0.10-1ubuntu0.1+esm3
  • phpmyadmin Ubuntu Pro 16.04 LTS 4:4.5.4.1-2ubuntu2.1+esm5

ubuntu advisories UBUNTU-CVE-2016-9866

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • phpMyAdmin openSUSE Tumbleweed 4.6.5.2-1.1

opensuse advisories openSUSE-SU-2024:10054-1

  • phpmyadmin Alpine 3.24, Alpine 3.23, Alpine 3.22 +18 more 4.6.5.2-r0
  • phpmyadmin Alpine 3.2 4.4.15.9-r0

alpine advisories ALPINE-CVE-2016-9866

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-9866 updated

phpMyAdmin: Multiple vulnerabilities fixed in 4.0.10.18, 4.4.15.9 and 4.6.5 versions

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist phpmyadmin/phpmyadmin
>=4.6.0, <4.6.5
>=4.4.0, <4.4.15.9
>=4.0.0, <4.0.10.18
4.6.5
4.4.15.9
4.0.10.18

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.