CVE-2024-34000Network attack vector

Authenticated script execution via unescaped identity fields

Published May 31, 2024 · Updated Nov 14, 2024

Stored XSS in Moodle LMS before 4.1.10, 4.2.7, and 4.3.4 allows remote authenticated users to execute script via a user ID number. lesson_get_overview_report_table_and_data() appends identity-field values to report rows without escaping them for HTML output. The gate is authenticated access to set an identity field; rendering the lesson overview report places the stored value in the browser context.

CVSS severity4.3
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Moodle LMS before 4.1.10, 4.2.7, and 4.3.4 allows remote authenticated users to execute script via a user ID number. lesson_get_overview_report_table_and_data() appends identity-field values to report rows without escaping them for HTML output. The gate is authenticated access to set an identity field; rendering the lesson overview report places the stored value in the browser context.

The record

CVE
CVE-2024-34000
Published
May 31, 2024
Updated
Nov 14, 2024
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 31, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 14, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0 <=4.3.3
  2. Affected versionversion=4.1 <=4.1.9
  3. Affected versionversion=4.2 <=4.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Moodle · Moodle LMSversion=4.0 <=4.3.3; version=4.1 <=4.1.9; version=4.2 <=4.2.6

Published CVSS scores

4.3GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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