CVE-2025-3638Network attack vector

Unintended course analysis via missing session token

Published Apr 25, 2025 · Updated Apr 28, 2025

CSRF in the Brickfield tool in Moodle LMS allows remote attackers to trigger course analysis through a crafted request. The requestanalysis branch in admin/tool/brickfield/index.php calls scheduler::request_course_analysis() without first validating the session key. Exploitation requires an authenticated victim with access to the affected action to submit the attacker-controlled request, causing an unintended analysis job to be scheduled.

CVSS severity8.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in the Brickfield tool in Moodle LMS allows remote attackers to trigger course analysis through a crafted request. The requestanalysis branch in admin/tool/brickfield/index.php calls scheduler::request_course_analysis() without first validating the session key. Exploitation requires an authenticated victim with access to the affected action to submit the attacker-controlled request, causing an unintended analysis job to be scheduled.

The record

CVE
CVE-2025-3638
Published
Apr 25, 2025
Updated
Apr 28, 2025
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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 <4.1.18
  2. Affected versionversion=4.3.0 <4.3.12
  3. Affected versionversion=4.4.0 <4.4.8
  4. Affected versionversion=4.5.0 <4.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moodle · Moodle LMSversion=4.1.0 <4.1.18; version=4.3.0 <4.3.12; version=4.4.0 <4.4.8; version=4.5.0 <4.5.4

Published CVSS scores

1.3GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)

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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