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MEDIUM severity

CVE-2021-32828 — nuxeo-platform-oauth

MEDIUM

CVE-2021-32828 is a medium-severity (CVSS 6.1) Deserialization of Untrusted Data vulnerability in org.nuxeo.ecm.platform:nuxeo-platform-oauth. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Nuxeo vulnerable to Reflected Cross-Site Scripting leading to Remote Code Execution

Also known asGHSA-x347-fc9w-w7c3
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
2 known
Exploitation data as of Nov 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2021-32828.

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk+0.03%
Lower risk than most CVEs56th percentile — riskier than 56% of all scored CVEsHighest risk
0.00%0.42%0.85%1.27%0.3%0.8%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕org.nuxeo.ecm.platform:nuxeo-platform-oauth

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
☕Mavenorg.nuxeo.ecm.platform:nuxeo-platform-oauthall versionsNo fix

Affected Products

1 product · 1 configurations
Application
nuxeohyland
≤ 11.5.109
range
Exploits & PoCs
2

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

The Nuxeo Platform is an open source content management platform for bui…

github.comNVDJan 2023

Report on securitylab.github.com

securitylab.github.comNVDJan 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.nuxeo.ecm.platform:nuxeo-platform-oauth, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of org.nuxeo.ecm.platform:nuxeo-platform-oauth for CVE-2021-32828. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

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.
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CVE-2021-32828: nuxeo-platform-oauth RCE (Medium 6.1)