CVE-2025-67857Network attack vector

User ID disclosure via unmasked action URLs

Published Feb 3, 2026 · Updated Feb 3, 2026

Information disclosure in affected Moodle LMS releases allows attackers to read internal user IDs from blind-marking action URLs. The Assignment grading table builds action links with each submission row's real userid parameter even when blind marking is enabled, rather than substituting the anonymous blindid. A grader's interaction with the anonymous-submissions page exposes only internal identifiers, undermining blind marking without changing grades or availability.

CVSS severity4.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in affected Moodle LMS releases allows attackers to read internal user IDs from blind-marking action URLs. The Assignment grading table builds action links with each submission row's real userid parameter even when blind marking is enabled, rather than substituting the anonymous blindid. A grader's interaction with the anonymous-submissions page exposes only internal identifiers, undermining blind marking without changing grades or availability.

The record

CVE
CVE-2025-67857
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-201
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 2026Record 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 <4.1.22
  2. Affected versionversion=4.4.0 <4.4.12
  3. Affected versionversion=4.5.0 <4.5.8
  4. Affected versionversion=5.0.0 <5.0.4
  5. Affected versionversion=5.1.0 <5.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moodle · Moodle LMSversion=4.1.0 <4.1.22; version=4.4.0 <4.4.12; version=4.5.0 <4.5.8; version=5.0.0 <5.0.4; version=5.1.0 <5.1.1

Published CVSS scores

4.3Fedora ProjectCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 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-201Insertion of Sensitive Information Into Sent Data

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo