CVE-2021-23369 (JavaScript, published 2021-04-12T14:15Z)
Description: value: The package handlebars before 4.7.7 are vulnerable to Remote Code Execution (RCE) when selecting certain compiling options to compile templates coming from an untrusted source.
Severity: HIGH (CVSS v3 base score: 9.8)
Weakness: NVD-CWE-noinfo \u2014 Insufficient Information
There is insufficient information about the issue to classify it; details are unkown or unspecified.
Repository: https://github.com/handlebars-lang/handlebars.js
Files changed:
lib/handlebars/compiler/javascript-compiler.js
package-lock.json
spec/security.js
Commit message: fix: escape property names in compat mode (#1736)


Vulnerable code:
    return [this.aliasable('container.lookup'), '(depths, "', name, '")'];
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Fixed code:
    return [
      this.aliasable('container.lookup'),
      '(depths, ',
      JSON.stringify(name),
      ')'
    ];
  "version": "4.7.6",
        "typescript": "^4.3.0-dev.20210213"
          "version": "4.3.0-dev.20210213",
          "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.0-dev.20210213.tgz",
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      "version": "1.2.13",
      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.2.13.tgz",
      "integrity": "sha512-oWb1Z6mkHIskLzEJ/XWX0srkpkTQ7vaopMQkyaEIoq0fmtFVxOthb8cCxeT+p3ynTdkk/RZwbgG4brR5BeWECw==",
        "nan": "^2.12.1"
      "version": "2.14.2",
      "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.2.tgz",
      "integrity": "sha512-M2ufzIiINKCuDfBSAUr1vWQ+vuVcA9kqx8JJUsbQi6yf1uGRyb7HfpdfUr5qLXf3B/t8dPvcjhKMmlfnP47EzQ==",

  describe('escapes template variables', function() {
    it('in compat mode', function() {
      expectTemplate("{{'a\\b'}}")
        .withCompileOptions({ compat: true })
        .withInput({ 'a\\b': 'c' })
        .toCompileTo('c');
    });

    it('in default mode', function() {
      expectTemplate("{{'a\\b'}}")
        .withCompileOptions()
        .withInput({ 'a\\b': 'c' })
        .toCompileTo('c');
    });
    it('in default mode', function() {
      expectTemplate("{{'a\\b'}}")
        .withCompileOptions({ strict: true })
        .withInput({ 'a\\b': 'c' })
        .toCompileTo('c');
    });
  });