CVE-2024-43438Network attack vector

Unauthorized messaging via unchecked report recipients

Published Nov 7, 2024 · Updated Nov 7, 2024

Incorrect authorization in Moodle LMS before 4.1.12 and affected 4.2 through 4.4 releases allows remote attackers to message arbitrary site users. The Feedback activity's non-respondents report accepts bulk-message recipient identifiers without checking that each belongs to the report's returned user set. Moodle has not documented a role or configuration prerequisite; abuse is bounded to sending unauthorized messages rather than controlling accounts.

CVSS severity7.5
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Moodle LMS before 4.1.12 and affected 4.2 through 4.4 releases allows remote attackers to message arbitrary site users. The Feedback activity's non-respondents report accepts bulk-message recipient identifiers without checking that each belongs to the report's returned user set. Moodle has not documented a role or configuration prerequisite; abuse is bounded to sending unauthorized messages rather than controlling accounts.

The record

CVE
CVE-2024-43438
Published
Nov 7, 2024
Updated
Nov 7, 2024
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-863, CWE-639
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <4.1.12
  2. Affected versionversion=4.2 <4.2.9
  3. Affected versionversion=4.3 <4.3.6
  4. Affected versionversion=4.4 <4.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moodle · Moodle LMSversion=0 <4.1.12; version=4.2 <4.2.9; version=4.3 <4.3.6; version=4.4 <4.4.2

Published CVSS scores

7.5Fedora ProjectCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.6GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-639Authorization Bypass Through User-Controlled Key

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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