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Vulnerability details: VCID-ye61-wgg3-43cg
Vulnerability ID VCID-ye61-wgg3-43cg
Aliases CVE-2016-3166
GHSA-fg5q-r2q5-qmh3
Summary Drupal CRLF injection vulnerability in the drupal_set_header function CRLF injection vulnerability in the drupal_set_header function in Drupal 6.x before 6.38, when used with PHP before 5.1.2, allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks by leveraging a module that allows user-submitted data to appear in HTTP headers.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00497 https://api.first.org/data/v1/epss?cve=CVE-2016-3166
cvssv3.1 5.9 https://github.com/drupal/core
generic_textual MODERATE https://github.com/drupal/core
cvssv3.1 5.9 https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-3166.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-3166.yaml
cvssv3.1 5.9 https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-3166.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-3166.yaml
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2016-3166
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2016-3166
cvssv3.1 5.9 https://www.drupal.org/SA-CORE-2016-001
generic_textual MODERATE https://www.drupal.org/SA-CORE-2016-001
cvssv3.1 5.9 http://www.debian.org/security/2016/dsa-3498
generic_textual MODERATE http://www.debian.org/security/2016/dsa-3498
cvssv3.1 5.9 http://www.openwall.com/lists/oss-security/2016/02/24/19
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2016/02/24/19
cvssv3.1 5.9 http://www.openwall.com/lists/oss-security/2016/03/15/10
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2016/03/15/10
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2016-3166
https://github.com/drupal/core
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-3166.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-3166.yaml
https://nvd.nist.gov/vuln/detail/CVE-2016-3166
https://www.drupal.org/SA-CORE-2016-001
http://www.debian.org/security/2016/dsa-3498
http://www.openwall.com/lists/oss-security/2016/02/24/19
http://www.openwall.com/lists/oss-security/2016/03/15/10
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/drupal/core
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-3166.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-3166.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-3166
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://www.drupal.org/SA-CORE-2016-001
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://www.debian.org/security/2016/dsa-3498
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://www.openwall.com/lists/oss-security/2016/02/24/19
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://www.openwall.com/lists/oss-security/2016/03/15/10
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.64808
EPSS Score 0.00497
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:25:49.430969+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-fg5q-r2q5-qmh3/GHSA-fg5q-r2q5-qmh3.json 36.1.3