THREATPORT/VULNERABILITY/CVE-2020-8165
CRITICAL SEVERITY

CVE-2020-8165

Rails vulnerability

CVSS
9.8
EPSS
45.7%
EPSS pct
99th
Exploited
No known
A deserialization of untrusted data vulnernerability exists in rails < 5.2.4.3, rails < 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE.
Affected vendor
Rubyonrails
Affected product
Rails
CVSS vector
CVSS:3.1/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
2020-06-19

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 45.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2020-8165

  • Confirm whether Rubyonrails Rails is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2020-8165.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-8165

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-8165 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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