CVE-2024-38273Network attack vector

Meeting join URL disclosure via missing capability check

Published Jun 18, 2024 · Updated Feb 13, 2025

Improper access control in Moodle LMS through 4.4 allows remote authenticated users to obtain unauthorized BigBlueButton join URLs. The mod_bigbluebuttonbn get_join_url web service called meeting::join_meeting after context validation without verifying instance::can_join(). A valid Moodle account and access to the web service are required; exploitation discloses a meeting join URL for an activity the account cannot join.

CVSS severity5.3
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Moodle LMS through 4.4 allows remote authenticated users to obtain unauthorized BigBlueButton join URLs. The mod_bigbluebuttonbn get_join_url web service called meeting::join_meeting after context validation without verifying instance::can_join(). A valid Moodle account and access to the web service are required; exploitation discloses a meeting join URL for an activity the account cannot join.

The record

CVE
CVE-2024-38273
Published
Jun 18, 2024
Updated
Feb 13, 2025
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-284
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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=4.1 <=4.1.10
  2. Affected versionversion=4.2 <=4.2.7
  3. Affected versionversion=4.3 <=4.3.4
  4. Affected versionversion=4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Moodle · Moodle LMSversion=4.1 <=4.1.10; version=4.2 <=4.2.7; version=4.3 <=4.3.4; version=4.4

Published CVSS scores

5.4UbuntuCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
5.3GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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-284Improper Access Control

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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