CVE-2024-38275Network attack vector

Authorization-header disclosure via cross-host redirects

Published Jun 18, 2024 · Updated Aug 2, 2024

Information disclosure in affected Moodle LMS 4.1 through 4.4 releases allows remote attackers to read HTTP authorization headers through redirects. The cURL wrapper reuses CURLOPT_HTTPAUTH and CURLOPT_USERPWD while emulating a redirect, even when the redirect URL changes hosts. Exploitation requires a Moodle workflow to request an attacker-controlled redirect while carrying HTTP authorization data; the attacker receives those credentials at the redirect destination.

CVSS severity7.5
High
EPSS probability0.45%
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 4.1 through 4.4 releases allows remote attackers to read HTTP authorization headers through redirects. The cURL wrapper reuses CURLOPT_HTTPAUTH and CURLOPT_USERPWD while emulating a redirect, even when the redirect URL changes hosts. Exploitation requires a Moodle workflow to request an attacker-controlled redirect while carrying HTTP authorization data; the attacker receives those credentials at the redirect destination.

The record

CVE
CVE-2024-38275
Published
Jun 18, 2024
Updated
Aug 2, 2024
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-459, CWE-226
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=4.1.0 <=4.1.10
  2. Affected versionversion=4.1 <=4.1.10
  3. Affected versionversion=4.2.0 <=4.2.7
  4. Affected versionversion=4.2 <=4.2.7
  5. Affected versionversion=4.3.0 <=4.3.4
  6. Affected versionversion=4.3 <=4.3.4
  7. Affected versionversion=4.4
  8. Affected versionversion=4.4.0 <4.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moodle · Moodle LMSversion=4.1.0 <=4.1.10; version=4.1 <=4.1.10; version=4.2.0 <=4.2.7; version=4.2 <=4.2.7; version=4.3.0 <=4.3.4; version=4.3 <=4.3.4; version=4.4; version=4.4.0 <4.4.1

Published CVSS scores

5.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-459Incomplete Cleanup
CWE-226Sensitive Information in Resource Not Removed Before Reuse

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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