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Vulnerability details: VCID-gk6q-3evd-xqbp
Vulnerability ID VCID-gk6q-3evd-xqbp
Aliases CVE-2020-1691
GHSA-cwhp-rqfr-8462
Summary Moodle XSS Vulnerability In Moodle 3.8, messages required extra sanitizing before updating the conversation overview, to prevent the risk of stored cross-site scripting.
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 0.00719 https://api.first.org/data/v1/epss?cve=CVE-2020-1691
epss 0.00719 https://api.first.org/data/v1/epss?cve=CVE-2020-1691
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-cwhp-rqfr-8462
cvssv3.1 5.4 https://github.com/moodle/moodle/commit/4e809346537e230cbff8235bfee0e7e151e4e9f9
generic_textual MODERATE https://github.com/moodle/moodle/commit/4e809346537e230cbff8235bfee0e7e151e4e9f9
cvssv3.1 5.4 https://moodle.org/mod/forum/discuss.php?d=395953
generic_textual MODERATE https://moodle.org/mod/forum/discuss.php?d=395953
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2020-1691
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2020-1691
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-1691
https://github.com/moodle/moodle/commit/4e809346537e230cbff8235bfee0e7e151e4e9f9
https://moodle.org/mod/forum/discuss.php?d=395953
https://nvd.nist.gov/vuln/detail/CVE-2020-1691
GHSA-cwhp-rqfr-8462 https://github.com/advisories/GHSA-cwhp-rqfr-8462
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/moodle/moodle/commit/4e809346537e230cbff8235bfee0e7e151e4e9f9
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:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://moodle.org/mod/forum/discuss.php?d=395953
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:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-1691
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 0.71481
EPSS Score 0.00719
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:24:37.895881+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/08/GHSA-cwhp-rqfr-8462/GHSA-cwhp-rqfr-8462.json 36.1.3