CVEvulnerability

CVE-2021-41170

9.8 CRITICAL Published 2021-11-08 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-11-08
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
Weaknesses
CWE-277, CWE-732, CWE-74

Description

neoan3-apps/template is a neoan3 minimal template engine. Versions prior to 1.1.1 have allowed for passing in closures directly into the template engine. As a result values that are callable are executed by the template engine. The issue arises if a value has the same name as a method or function in scope and can therefore be executed either by mistake or maliciously. In theory all users of the package are affected as long as they either deal with direct user input or database values. A multi-step attack on is therefore plausible. Version 1.1.1 has addressed this vulnerability. Unfortunately only working with hardcoded values is safe in prior versions. As this likely defeats the purpose of a template engine, please upgrade.

Affected configurations

• neoan neoan3-template (< 1.1.1)

Related

Weakness · CWE (3)

  • CWE-277 Insecure Inherited Permissions weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component weakness

References