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Vulnerability details: VCID-kddq-k11b-6qbz
Vulnerability ID VCID-kddq-k11b-6qbz
Aliases CVE-2017-12156
GHSA-7mfw-g8x4-rq2w
Summary Moodle XSS Vulnerability Moodle 3.x has XSS in the contact form on the "non-respondents" page in non-anonymous feedback.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2017-12156
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2017-12156
cvssv3.1 6.1 https://github.com/moodle/moodle
generic_textual MODERATE https://github.com/moodle/moodle
cvssv3.1 6.1 https://github.com/moodle/moodle/commit/a39d2976fe5e91da7a28a8512d5b94d4a27067b8
generic_textual MODERATE https://github.com/moodle/moodle/commit/a39d2976fe5e91da7a28a8512d5b94d4a27067b8
cvssv3.1 6.1 https://moodle.org/mod/forum/discuss.php?d=358585
generic_textual MODERATE https://moodle.org/mod/forum/discuss.php?d=358585
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2017-12156
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2017-12156
cvssv3.1 6.1 https://web.archive.org/web/20210124104026/http://www.securityfocus.com/bid/100867
generic_textual MODERATE https://web.archive.org/web/20210124104026/http://www.securityfocus.com/bid/100867
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2017-12156
https://github.com/moodle/moodle
https://github.com/moodle/moodle/commit/a39d2976fe5e91da7a28a8512d5b94d4a27067b8
https://moodle.org/mod/forum/discuss.php?d=358585
https://nvd.nist.gov/vuln/detail/CVE-2017-12156
https://web.archive.org/web/20210124104026/http://www.securityfocus.com/bid/100867
http://www.securityfocus.com/bid/100867
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/moodle/moodle/commit/a39d2976fe5e91da7a28a8512d5b94d4a27067b8
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:N/UI:R/S:C/C:L/I:L/A:N Found at https://moodle.org/mod/forum/discuss.php?d=358585
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:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2017-12156
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:N/UI:R/S:C/C:L/I:L/A:N Found at https://web.archive.org/web/20210124104026/http://www.securityfocus.com/bid/100867
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 0.44469
EPSS Score 0.00217
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:28:53.316170+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-7mfw-g8x4-rq2w/GHSA-7mfw-g8x4-rq2w.json 36.1.3