Vulnerability Database

388,831

Total vulnerabilities in the database

CVE-2013-4521 — nuxeo / nuxeo

Deserialization of Untrusted Data

RichFaces implementation in Nuxeo Platform 5.6.0 before HF27 and 5.8.0 before HF-01 does not restrict the classes for which deserialization methods can be called, which allows remote attackers to execute arbitrary code via crafted serialized data. NOTE: this vulnerability may overlap CVE-2013-2165.

  • Published: Feb 6, 2020
  • Updated: Sep 23, 2026
  • CVE: CVE-2013-4521
  • Severity: Critical
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: Critical
  • Score: 9.8
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P
Software Affected versions
nuxeo / nuxeo = 5.6.0
nuxeo / nuxeo = 5.6.0-hotfix01
nuxeo / nuxeo = 5.6.0-hotfix02
nuxeo / nuxeo = 5.6.0-hotfix03
nuxeo / nuxeo = 5.6.0-hotfix04
nuxeo / nuxeo = 5.6.0-hotfix05
nuxeo / nuxeo = 5.6.0-hotfix06
nuxeo / nuxeo = 5.6.0-hotfix07
nuxeo / nuxeo = 5.6.0-hotfix08
nuxeo / nuxeo = 5.6.0-hotfix09
nuxeo / nuxeo = 5.6.0-hotfix10
nuxeo / nuxeo = 5.6.0-hotfix11
nuxeo / nuxeo = 5.6.0-hotfix12
nuxeo / nuxeo = 5.6.0-hotfix13
nuxeo / nuxeo = 5.6.0-hotfix14
nuxeo / nuxeo = 5.6.0-hotfix15
nuxeo / nuxeo = 5.6.0-hotfix16
nuxeo / nuxeo = 5.6.0-hotfix17
nuxeo / nuxeo = 5.6.0-hotfix18
nuxeo / nuxeo = 5.6.0-hotfix19
nuxeo / nuxeo = 5.6.0-hotfix20
nuxeo / nuxeo = 5.6.0-hotfix21
nuxeo / nuxeo = 5.6.0-hotfix22
nuxeo / nuxeo = 5.6.0-hotfix23
nuxeo / nuxeo = 5.6.0-hotfix24
nuxeo / nuxeo = 5.6.0-hotfix25
nuxeo / nuxeo = 5.6.0-hotfix26
nuxeo / nuxeo = 5.8.0

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.