CVE-2021-47717Public exploitNetwork attack vector

Unauthenticated username enumeration via divergent login responses

Published Dec 9, 2025 · Updated Apr 7, 2026

Username enumeration in IntelliChoice eFORCE Software Suite 2.5.9.6 allows remote attackers to identify valid accounts through login requests. The /eFORCECommand/Account/Login.aspx handler returns one message for a registered username with an invalid password and another for an unregistered username supplied in ctl00$MainContent$UserName. No authentication or user interaction is required; the disclosed account names support targeted credential attacks, but the flaw does not itself grant access.

CVSS severity6.9
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Username enumeration in IntelliChoice eFORCE Software Suite 2.5.9.6 allows remote attackers to identify valid accounts through login requests. The /eFORCECommand/Account/Login.aspx handler returns one message for a registered username with an invalid password and another for an unregistered username supplied in ctl00$MainContent$UserName. No authentication or user interaction is required; the disclosed account names support targeted credential attacks, but the flaw does not itself grant access.

The record

CVE
CVE-2021-47717
Published
Dec 9, 2025
Updated
Apr 7, 2026
Vendor
Intellichoice, Inc.
Product
EFORCE Software Suite
Classifications
CWE-204, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record 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=2.5.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Intellichoice, Inc. · EFORCE Software Suiteversion=2.5.9.6

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-204Observable Response Discrepancy
T1087Account Discovery

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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