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CVE-2016-3171

26
FAUCET Score

CVE-2016-3171 is a critical vulnerability affecting Drupal 6.x when used with specific older versions of PHP (before 5.4.45, 5.5.29, or 5.6.13). This flaw allows remote attackers to execute arbitrary code due to issues with session data truncation. With a CVSS score of 8.1 (High), it presents a significant risk, as it can be exploited remotely with high impact on confidentiality, integrity, and availability, though it requires high attack complexity. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:6.0:beta1:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:6.0:beta2:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:6.0:beta3:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:6.0:beta4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.19%
Probability of exploitation in next 30 days
EPSS Percentile
86.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0319 is in the 46th percentile among its peer group of 8,918 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: drupal/coreFixed in: 6.38
composerpatch availablevia ghsa
Product: drupal/drupalFixed in: 6.38

Vendor Advisories (1)

composerGHSA-69g8-g9jq-74v7high

Drupal arbitrary code execution

May 17, 2022

References

drupal.org / SA-CORE-2016-001
PatchVendor Advisory
debian.org / security/2016/dsa-3498
openwall.com / lists/oss-security/2016/02/24/19
openwall.com / lists/oss-security/2016/03/15/10