CVE-2025-62400Network attack vector

Authenticated group-name disclosure via unrestricted enumeration

Published Oct 23, 2025 · Updated Oct 23, 2025

Information disclosure in affected Moodle LMS releases allows remote authenticated users to read hidden group names through calendar event forms. The event creation paths in public/calendar/externallib.php and public/calendar/lib.php populate form options from course-wide group data instead of filtering the list through the access-aware group query. An account with event-creation permission but no access to hidden or separate groups can obtain their names; no group content, membership, modification, or service interruption is reported.

CVSS severity4.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected Moodle LMS releases allows remote authenticated users to read hidden group names through calendar event forms. The event creation paths in public/calendar/externallib.php and public/calendar/lib.php populate form options from course-wide group data instead of filtering the list through the access-aware group query. An account with event-creation permission but no access to hidden or separate groups can obtain their names; no group content, membership, modification, or service interruption is reported.

The record

CVE
CVE-2025-62400
Published
Oct 23, 2025
Updated
Oct 23, 2025
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-200, T1069
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 23, 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=4.1.0 <4.1.21
  2. Affected versionversion=4.4.0 <4.4.11
  3. Affected versionversion=4.5.0 <4.5.7
  4. Affected versionversion=5.0.0 <5.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Moodle · Moodle LMSversion=4.1.0 <4.1.21; version=4.4.0 <4.4.11; version=4.5.0 <4.5.7; version=5.0.0 <5.0.3

Published CVSS scores

4.3Fedora ProjectCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A: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-200Exposure of Sensitive Information to an Unauthorized Actor
T1069Permission Groups Discovery

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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