CyberSecBulletin

Improper Neutralization of Special Elements in Output Used by a Downstream Component

CWE-74

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

We track 4,033 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.9. 13 have been exploited in real attacks.

How this weakness is prevented

  • Requirements: Programming languages and supporting technologies might be chosen which are not subject to these issues.
  • Implementation: Utilize an appropriate mix of allowlist and denylist parsing to filter control-plane syntax from all input.

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