CVE-2024-32463: Phlex Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g7xq-xv8c-h98c",
  "modified" : "2024-04-19T21:44:03Z",
  "published" : "2024-04-17T00:20:23Z",
  "aliases" : [ "CVE-2024-32463" ],
  "summary" : "Cross-site Scripting (XSS) possible due to improper sanitisation of `href` attributes on `<a>` tags",
  "details" : "### Summary\nThere is a potential cross-site scripting (XSS) vulnerability that can be exploited via maliciously crafted user data.\n\nOur filter to detect and prevent the use of the `javascript:` URL scheme in the `href` attribute of an `<a>` tag could be bypassed with tab `\\t` or newline `\\n` characters between the characters of the protocol, e.g. `java\\tscript:`.\n\n### Impact\n\nIf you render an `<a>` tag with an `href` attribute set to a user-provided link, that link could potentially execute JavaScript when clicked by another user.\n\n```ruby\na(href: user_profile) { \"Profile\" }\n```\n\n### Mitigation\n\nThe best way to mitigate this vulnerability is to update to one of the following versions:\n\n- [1.10.1](https://rubygems.org/gems/phlex/versions/1.10.1)\n- [1.9.2](https://rubygems.org/gems/phlex/versions/1.9.2)\n- [1.8.3](https://rubygems.org/gems/phlex/versions/1.8.3)\n- [1.7.2](https://rubygems.org/gems/phlex/versions/1.7.2)\n- [1.6.3](https://rubygems.org/gems/phlex/versions/1.6.3)\n- [1.5.3](https://rubygems.org/gems/phlex/versions/1.5.3)\n- [1.4.2](https://rubygems.org/gems/phlex/versions/1.4.2)\n\n### Workarounds\nConfiguring a [Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) that does not allow [`unsafe-inline`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline) would effectively prevent this vulnerability from being exploited.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "phlex"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.10.0"
      }, {
        "fixed" : "1.10.1"
      } ]
    } ],
    "versions" : [ "1.10.0" ]
  }, {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "phlex"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.9.0"
      }, {
        "fixed" : "1.9.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "phlex"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.8.0"
      }, {
        "fixed" : "1.8.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "phlex"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.7.0"
      }, {
        "fixed" : "1.7.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "phlex"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.6.0"
      }, {
        "fixed" : "1.6.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "phlex"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.5.0"
      }, {
        "fixed" : "1.5.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "phlex"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.4.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/phlex-ruby/phlex/security/advisories/GHSA-g7xq-xv8c-h98c"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-32463"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/phlex-ruby/phlex/commit/9e3f5b980655817993682e409cbda72956d865cb"
  }, {
    "type" : "WEB",
    "url" : "https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy"
  }, {
    "type" : "WEB",
    "url" : "https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/phlex-ruby/phlex"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/phlex/CVE-2024-32463.yml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79", "CWE-87" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-17T00:20:23Z",
    "nvd_published_at" : "2024-04-17T16:15:09Z"
  }
}