VULNERABILITY INTELLIGENCE

CVE-2018-6334

CVSS score9.8 CRITICAL
EPSS probability1.91%
CISA KEVNot currently listed
Published2018-12-31
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Multipart-file uploads call variables to be improperly registered in the global scope. In cases where variables are not declared explicitly before being used this can lead to unexpected behavior. This affects all supported versions of HHVM prior to the patch (3.25.1, 3.24.5, and 3.21.9 and below).

Weakness classification

  • CWE-20: Improper Input Validation
  • CWE-621: Variable Extraction Error

Primary references