CVE-2025-66736Public exploitNetwork attack vector

Authenticated user creation via unchecked import endpoint

Published Dec 22, 2025 · Updated Dec 22, 2025

Missing authorization in youlai-boot 2.21.1 allows remote authenticated users to import arbitrary user records through its web API. SysUserController.importUsers accepts a spreadsheet and invokes UserImportListener, which persists each validated row without checking the caller's import permission. A regular account is sufficient; accepted rows create database users and attach any enabled roles named in the import.

CVSS severity7.1
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in youlai-boot 2.21.1 allows remote authenticated users to import arbitrary user records through its web API. SysUserController.importUsers accepts a spreadsheet and invokes UserImportListener, which persists each validated row without checking the caller's import permission. A regular account is sufficient; accepted rows create database users and attach any enabled roles named in the import.

The record

CVE
CVE-2025-66736
Published
Dec 22, 2025
Updated
Dec 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, CWE-284, T1136
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 22, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-284Improper Access Control
T1136Create Account

Public exploit references

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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