THREATPORT/VULNERABILITY/CVE-2016-4000
CRITICAL SEVERITY

CVE-2016-4000

Jython vulnerability

CVSS
9.8
EPSS
6.6%
EPSS pct
93th
Exploited
No known
Jython before 2.7.1rc1 allows attackers to execute arbitrary code via a crafted serialized PyFunction object.
Affected vendor
Jython Project
Affected product
Jython
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-502 — Deserialization of Untrusted Data
Published
2017-07-06

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 6.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2016-4000

  • Confirm whether Jython Project Jython is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2016-4000.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-4000

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-4000 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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