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Vulnerability details: VCID-8prn-y48f-83av
Vulnerability ID VCID-8prn-y48f-83av
Aliases CVE-2024-28593
GHSA-f6mh-79vh-2hv7
Summary Cross-site Scripting in Moodle Chat The Chat activity in Moodle 4.3.3 allows students to insert a potentially unwanted HTML A element or IMG element, or HTML content that leads to a performance degradation. NOTE: the vendor's Using_Chat page says "If you know some HTML code, you can use it in your text to do things like insert images, play sounds or create different coloured and sized text." This page also says "Chat is due to be removed from standard Moodle."
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94 Improper Control of Generation of Code ('Code Injection')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.0008 https://api.first.org/data/v1/epss?cve=CVE-2024-28593
epss 0.0008 https://api.first.org/data/v1/epss?cve=CVE-2024-28593
cvssv3.1 5.4 https://docs.moodle.org/403/en/Using_Chat
generic_textual MODERATE https://docs.moodle.org/403/en/Using_Chat
ssvc Track https://docs.moodle.org/403/en/Using_Chat
cvssv3.1 5.4 https://gist.githubusercontent.com/minendie/4f23174687bc4d8eb7f727d9959b5399/raw/9ce573cebcce5521d9d6f826ab68f3780036b874/CVE-2024-28593.txt
generic_textual MODERATE https://gist.githubusercontent.com/minendie/4f23174687bc4d8eb7f727d9959b5399/raw/9ce573cebcce5521d9d6f826ab68f3780036b874/CVE-2024-28593.txt
ssvc Track https://gist.githubusercontent.com/minendie/4f23174687bc4d8eb7f727d9959b5399/raw/9ce573cebcce5521d9d6f826ab68f3780036b874/CVE-2024-28593.txt
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-f6mh-79vh-2hv7
cvssv3.1 5.4 https://github.com/moodle/moodle
generic_textual MODERATE https://github.com/moodle/moodle
cvssv3.1 5.4 https://medium.com/%40lamscun/how-do-i-change-htmli-from-low-to-critical-your-email-box-is-safe-e7171efd88fe
generic_textual MODERATE https://medium.com/%40lamscun/how-do-i-change-htmli-from-low-to-critical-your-email-box-is-safe-e7171efd88fe
ssvc Track https://medium.com/%40lamscun/how-do-i-change-htmli-from-low-to-critical-your-email-box-is-safe-e7171efd88fe
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2024-28593
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2024-28593
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2024-28593
https://docs.moodle.org/403/en/Using_Chat
https://gist.githubusercontent.com/minendie/4f23174687bc4d8eb7f727d9959b5399/raw/9ce573cebcce5521d9d6f826ab68f3780036b874/CVE-2024-28593.txt
https://github.com/moodle/moodle
https://medium.com/%40lamscun/how-do-i-change-htmli-from-low-to-critical-your-email-box-is-safe-e7171efd88fe
https://nvd.nist.gov/vuln/detail/CVE-2024-28593
cpe:2.3:a:moodle:moodle:4.3.3:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:moodle:moodle:4.3.3:*:*:*:*:*:*:*
GHSA-f6mh-79vh-2hv7 https://github.com/advisories/GHSA-f6mh-79vh-2hv7
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N Found at https://docs.moodle.org/403/en/Using_Chat
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/2024-03-25T16:47:10Z/ Found at https://docs.moodle.org/403/en/Using_Chat
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N Found at https://gist.githubusercontent.com/minendie/4f23174687bc4d8eb7f727d9959b5399/raw/9ce573cebcce5521d9d6f826ab68f3780036b874/CVE-2024-28593.txt
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/2024-03-25T16:47:10Z/ Found at https://gist.githubusercontent.com/minendie/4f23174687bc4d8eb7f727d9959b5399/raw/9ce573cebcce5521d9d6f826ab68f3780036b874/CVE-2024-28593.txt
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N Found at https://medium.com/%40lamscun/how-do-i-change-htmli-from-low-to-critical-your-email-box-is-safe-e7171efd88fe
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/2024-03-25T16:47:10Z/ Found at https://medium.com/%40lamscun/how-do-i-change-htmli-from-low-to-critical-your-email-box-is-safe-e7171efd88fe
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2024-28593
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 0.2451
EPSS Score 0.0008
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:10:23.205362+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/03/GHSA-f6mh-79vh-2hv7/GHSA-f6mh-79vh-2hv7.json 36.1.3