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Vulnerability details: VCID-2tm9-etey-1ubv
Vulnerability ID VCID-2tm9-etey-1ubv
Aliases CVE-2023-28331
GHSA-77jm-f3vj-xvx2
Summary Moodle vulnerable to Cross-site Scripting Content output by the database auto-linking filter required additional sanitizing to prevent an XSS risk.
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 0.00594 https://api.first.org/data/v1/epss?cve=CVE-2023-28331
epss 0.00594 https://api.first.org/data/v1/epss?cve=CVE-2023-28331
cvssv3.1 6.1 https://bugzilla.redhat.com/show_bug.cgi?id=2179418
generic_textual MODERATE https://bugzilla.redhat.com/show_bug.cgi?id=2179418
ssvc Track https://bugzilla.redhat.com/show_bug.cgi?id=2179418
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-77jm-f3vj-xvx2
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/1899e0397350c4c2bb3e73773981f66f16f8f2fc
generic_textual MODERATE https://github.com/moodle/moodle/commit/1899e0397350c4c2bb3e73773981f66f16f8f2fc
cvssv3.1 6.1 https://git.moodle.org/gw?p=moodle.git;a=commitdiff;h=1899e0397350c4c2bb3e73773981f66f16f8f2fc
generic_textual MODERATE https://git.moodle.org/gw?p=moodle.git;a=commitdiff;h=1899e0397350c4c2bb3e73773981f66f16f8f2fc
cvssv3.1 6.1 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF
generic_textual MODERATE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF
cvssv3.1 6.1 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF/
ssvc Track https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF/
cvssv3.1 6.1 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF
generic_textual MODERATE https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF
cvssv3.1 6.1 https://moodle.org/mod/forum/discuss.php?d=445063
generic_textual MODERATE https://moodle.org/mod/forum/discuss.php?d=445063
ssvc Track https://moodle.org/mod/forum/discuss.php?d=445063
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2023-28331
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2023-28331
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2023-28331
https://bugzilla.redhat.com/show_bug.cgi?id=2179418
https://github.com/moodle/moodle
https://github.com/moodle/moodle/commit/1899e0397350c4c2bb3e73773981f66f16f8f2fc
https://git.moodle.org/gw?p=moodle.git;a=commitdiff;h=1899e0397350c4c2bb3e73773981f66f16f8f2fc
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF
https://moodle.org/mod/forum/discuss.php?d=445063
https://nvd.nist.gov/vuln/detail/CVE-2023-28331
3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF/
GHSA-77jm-f3vj-xvx2 https://github.com/advisories/GHSA-77jm-f3vj-xvx2
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://bugzilla.redhat.com/show_bug.cgi?id=2179418
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

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required

unchanged

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-02-25T20:19:46Z/ Found at https://bugzilla.redhat.com/show_bug.cgi?id=2179418
Vector: CVSS:3.1/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

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unchanged

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/moodle/moodle/commit/1899e0397350c4c2bb3e73773981f66f16f8f2fc
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

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://git.moodle.org/gw?p=moodle.git;a=commitdiff;h=1899e0397350c4c2bb3e73773981f66f16f8f2fc
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

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required

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF
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

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required

unchanged

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF/
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

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required

unchanged

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high

low

none

high

low

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-02-25T20:19:46Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF
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

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required

unchanged

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Vector: CVSS:3.1/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=445063
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-02-25T20:19:46Z/ Found at https://moodle.org/mod/forum/discuss.php?d=445063
Vector: CVSS:3.1/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-2023-28331
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

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none

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Exploit Prediction Scoring System (EPSS)
Percentile 0.68281
EPSS Score 0.00594
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:15:07.167101+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/03/GHSA-77jm-f3vj-xvx2/GHSA-77jm-f3vj-xvx2.json 36.1.3