CVE-2019-20478

Ruamel.Yaml vulnerability

CVSS

9.8

EPSS

6.8%

EPSS pct

93th

Exploited

No known

In ruamel.yaml through 0.16.7, the load method allows remote code execution if the application calls this method with an untrusted argument. In other words, this issue affects developers who are unaware of the need to use methods such as safe_load in these use cases.

Affected vendor

Ruamel.Yaml Project

Affected product

Ruamel.Yaml

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

2020-02-19

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 6.8% 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-2019-20478

Confirm whether Ruamel.Yaml Project Ruamel.Yaml is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2019-20478.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-20478

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-20478 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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