THREATPORT/VULNERABILITY/CVE-2021-23358
LOW SEVERITY

CVE-2021-23358

Underscore vulnerability

CVSS
3.3
EPSS
4.1%
EPSS pct
90th
Exploited
No known
The package underscore from 1.13.0-0 and before 1.13.0-2, from 1.3.2 and before 1.12.1 are vulnerable to Arbitrary Code Injection via the template function, particularly when a variable property is passed as an argument as it is not sanitized.
Affected vendor
Underscorejs
Affected product
Underscore
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
Weakness type (CWE)
Published
2021-03-29

Risk analysis

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

Its EPSS score of 4.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2021-23358

  • Confirm whether Underscorejs Underscore is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-23358.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-23358

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-23358 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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