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Vulnerability details: VCID-fysb-jb1y-abff
Vulnerability ID VCID-fysb-jb1y-abff
Aliases CVE-2016-2151
GHSA-r3fc-hx6q-g6cq
Summary Moodle allows attackers to discover student e-mail addresses user/index.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 grants excessive authorization on the basis of the moodle/course:viewhiddenuserfields capability, which allows remote authenticated users to discover student e-mail addresses by leveraging the teacher role and reading a Participants list.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
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
cvssv3.1 4.3 http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-52433
generic_textual MODERATE http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-52433
epss 0.00348 https://api.first.org/data/v1/epss?cve=CVE-2016-2151
epss 0.00348 https://api.first.org/data/v1/epss?cve=CVE-2016-2151
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-r3fc-hx6q-g6cq
cvssv3.1 4.3 https://github.com/moodle/moodle
generic_textual MODERATE https://github.com/moodle/moodle
cvssv3.1 4.3 https://github.com/moodle/moodle/commit/089ab60017cd3207990658fbd37f7f31948539fa
generic_textual MODERATE https://github.com/moodle/moodle/commit/089ab60017cd3207990658fbd37f7f31948539fa
cvssv3.1 4.3 https://github.com/moodle/moodle/commit/094fddd00f2e8e832e21e80f417c7b88b33a1f27
generic_textual MODERATE https://github.com/moodle/moodle/commit/094fddd00f2e8e832e21e80f417c7b88b33a1f27
cvssv3.1 4.3 https://github.com/moodle/moodle/commit/85380c6b616e82e31115fbb585d37f0e15f8b0b2
generic_textual MODERATE https://github.com/moodle/moodle/commit/85380c6b616e82e31115fbb585d37f0e15f8b0b2
cvssv3.1 4.3 https://github.com/moodle/moodle/commit/8e24a54e526c149469bd77c910876c4489e87841
generic_textual MODERATE https://github.com/moodle/moodle/commit/8e24a54e526c149469bd77c910876c4489e87841
cvssv3.1 4.3 https://github.com/moodle/moodle/commit/a0034bb01773e36dffed2a665646f9cc31d68d5b
generic_textual MODERATE https://github.com/moodle/moodle/commit/a0034bb01773e36dffed2a665646f9cc31d68d5b
cvssv3.1 4.3 https://moodle.org/mod/forum/discuss.php?d=330173
generic_textual MODERATE https://moodle.org/mod/forum/discuss.php?d=330173
cvssv3.1 4.3 https://nvd.nist.gov/vuln/detail/CVE-2016-2151
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2016-2151
cvssv3.1 4.3 https://web.archive.org/web/20160424224349/http://www.securitytracker.com/id/1035333
generic_textual MODERATE https://web.archive.org/web/20160424224349/http://www.securitytracker.com/id/1035333
cvssv3.1 4.3 http://www.openwall.com/lists/oss-security/2016/03/21/1
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2016/03/21/1
Reference id Reference type URL
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-52433
https://api.first.org/data/v1/epss?cve=CVE-2016-2151
https://github.com/moodle/moodle
https://github.com/moodle/moodle/commit/089ab60017cd3207990658fbd37f7f31948539fa
https://github.com/moodle/moodle/commit/094fddd00f2e8e832e21e80f417c7b88b33a1f27
https://github.com/moodle/moodle/commit/85380c6b616e82e31115fbb585d37f0e15f8b0b2
https://github.com/moodle/moodle/commit/8e24a54e526c149469bd77c910876c4489e87841
https://github.com/moodle/moodle/commit/a0034bb01773e36dffed2a665646f9cc31d68d5b
https://moodle.org/mod/forum/discuss.php?d=330173
https://nvd.nist.gov/vuln/detail/CVE-2016-2151
https://web.archive.org/web/20160424224349/http://www.securitytracker.com/id/1035333
http://www.openwall.com/lists/oss-security/2016/03/21/1
GHSA-r3fc-hx6q-g6cq https://github.com/advisories/GHSA-r3fc-hx6q-g6cq
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-52433
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://github.com/moodle/moodle
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://github.com/moodle/moodle/commit/089ab60017cd3207990658fbd37f7f31948539fa
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://github.com/moodle/moodle/commit/094fddd00f2e8e832e21e80f417c7b88b33a1f27
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://github.com/moodle/moodle/commit/85380c6b616e82e31115fbb585d37f0e15f8b0b2
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://github.com/moodle/moodle/commit/8e24a54e526c149469bd77c910876c4489e87841
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://github.com/moodle/moodle/commit/a0034bb01773e36dffed2a665646f9cc31d68d5b
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://moodle.org/mod/forum/discuss.php?d=330173
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-2151
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://web.archive.org/web/20160424224349/http://www.securitytracker.com/id/1035333
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:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at http://www.openwall.com/lists/oss-security/2016/03/21/1
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 0.56578
EPSS Score 0.00348
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:27:13.958070+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-r3fc-hx6q-g6cq/GHSA-r3fc-hx6q-g6cq.json 36.1.3