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MEDIUM severity

CVE-2016-3168 — core

MEDIUM

CVE-2016-3168 is a medium-severity (CVSS 6.4) CWE-254 vulnerability in drupal/core. A fix is available for drupal/core — see the affected versions and patch details below.

Drupal Reflected file download vulnerability

Also known asGHSA-qqxc-cppg-4xp8
Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs85th percentile — riskier than 85% of all scored CVEsHighest risk
0.00%1.02%2.04%3.07%0.5%2.5%May 26Aug 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected
🐘drupal/core🐘drupal/core🐘drupal/drupal🐘drupal/drupal

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

The System module in Drupal 6.x before 6.38 and 7.x before 7.43 might allow remote attackers to hijack the authentication of site administrators for requests that download and run files with arbitrary JSON-encoded content, aka a "reflected file download vulnerability."

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistdrupal/core≥ 6.0&&< 6.386.38composer require drupal/core:^6.38
🐘Packagistdrupal/core≥ 7.0&&< 7.437.43composer require drupal/core:^7.43
🐘Packagistdrupal/drupal≥ 7.0&&< 7.437.43composer require drupal/drupal:^7.43
🐘Packagistdrupal/drupal≥ 6.0&&< 6.386.38composer require drupal/drupal:^6.38

Affected Products

2 products · 107 configurations
OS
debian linuxdebian
2 versions
7.08.0
Application
drupaldrupal
81 versions
6.06.16.26.36.46.56.66.76.86.96.106.11

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for drupal/core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update drupal/core to 6.38 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-3168 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

The System module in Drupal 6.x before 6.38 and 7.x before 7.43 might allow remote attackers to hijack the authentication of site administrators for requests that download and run files with arbitrary JSON-encoded content, aka a "reflected file download vulnerability."
O3 Security · Impact-Aware SCA

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CVE-2016-3168: core — Fixed in 6.38