CVE-2019-20920

Aliases:GHSA-3cqr-58rm-57f8
Advisory lineage Upstream: 0 Downstream: 3
Modified
Published: 30 Sept 2020, 12:30
Last modified:05 Aug 2024, 03:00

Vulnerability Summary

Overall Risk (default)
medium
42/100
CVSS Score
8.1 HIGH
v3.1 (nvd)
EPSS Score
0.34% LOW
0% probability -0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

30 Sept 2020, 12:30
Published
Vulnerability first disclosed
05 Aug 2024, 03:00
Last Modified
Vulnerability information updated

Description

Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).

CVSS Metrics

  • v3.1•HIGH•Score: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L
  • v2.0•MEDIUM•Score: 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.34%• Percentile: 57%

Techniques & Countermeasures

  • CWE-94•Improper Control of Generation of Code ('Code Injection')

    The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Affected Systems

  • handlebarsjs•handlebars

    < 3.0.8 | ≥ 4.0.0, < 4.5.3

  • Npm•handlebars

    < 3.0.8 | ≥ 4.0.0, < 4.5.3

References (7)