Sylius has potential Cross Site Scripting vulnerability via the "Province" field in the Checkout and Address Book

Impact

There is a possibility to save XSS code in province field in the Checkout and Address Book and then execute it on these pages. The problem occurs when you open the address step page in the checkout or edit the address in the address book. This only affects the base UI Shop provided by Sylius.

Patches

The issue is fixed in versions: 1.9.12, 1.10.16, 1.11.17, 1.12.16, 1.13.1 and above.

Workarounds

1. Create new file assets/shop/sylius-province-field.js:

// assets/shop/sylius-province-field.js

function sanitizeInput(input) {
  const div = document.createElement('div');
  div.textContent = input;
  return div.innerHTML; // Converts text content to plain HTML, stripping any scripts
}

const getProvinceInputValue = function getProvinceInputValue(valueSelector) {
  return valueSelector == undefined ? '' : `value="${sanitizeInput(valueSelector)}"`;
};

$.fn.extend({
  provinceField() {
    const countrySelect = $('select[name$="[countryCode]"]');

    countrySelect.on('change', (event) => {
      const select = $(event.currentTarget);
      const provinceContainer = select.parents('.field').next('div.province-container');

      const provinceSelectFieldName = select.attr('name').replace('country', 'province');
      const provinceInputFieldName = select.attr('name').replace('countryCode', 'provinceName');

      const provinceSelectFieldId = select.attr('id').replace('country', 'province');
      const provinceInputFieldId = select.attr('id').replace('countryCode', 'provinceName');

      const form = select.parents('form');

      if (select.val() === '' || select.val() == undefined) {
        provinceContainer.fadeOut('slow', () => {
          provinceContainer.html('');
        });

        return;
      }

      provinceContainer.attr('data-loading', true);
      form.addClass('loading');

      $.get(provinceContainer.attr('data-url'), { countryCode: select.val() }, (response) => {
        if (!response.content) {
          provinceContainer.fadeOut('slow', () => {
            provinceContainer.html('');

            provinceContainer.removeAttr('data-loading');
            form.removeClass('loading');
          });
        } else if (response.content.indexOf('select') !== -1) {
          provinceContainer.fadeOut('slow', () => {
            const provinceSelectValue = getProvinceInputValue((
              $(provinceContainer).find('select > option[selected$="selected"]').val()
            ));

            provinceContainer.html((
              response.content
                .replace('name="sylius_address_province"', `name="${provinceSelectFieldName}"${provinceSelectValue}`)
                .replace('id="sylius_address_province"', `id="${provinceSelectFieldId}"`)
                .replace('option value="" selected="selected"', 'option value=""')
                .replace(`option ${provinceSelectValue}`, `option ${provinceSelectValue}" selected="selected"`)
            ));
            provinceContainer.addClass('required');
            provinceContainer.removeAttr('data-loading');

            provinceContainer.fadeIn('fast', () => {
              form.removeClass('loading');
            });
          });
        } else {
          provinceContainer.fadeOut('slow', () => {
            const provinceInputValue = getProvinceInputValue($(provinceContainer).find('input').val());

            provinceContainer.html((
              response.content
                .replace('name="sylius_address_province"', `name="${provinceInputFieldName}"${provinceInputValue}`)
                .replace('id="sylius_address_province"', `id="${provinceInputFieldId}"`)
            ));

            provinceContainer.removeAttr('data-loading');

            provinceContainer.fadeIn('fast', () => {
              form.removeClass('loading');
            });
          });
        }
      });
    });

    if (countrySelect.val() !== '') {
      countrySelect.trigger('change');
    }

    if ($.trim($('div.province-container').text()) === '') {
      $('select.country-select').trigger('change');
    }

    const shippingAddressCheckbox = $('input[type="checkbox"][name$="[differentShippingAddress]"]');
    const shippingAddressContainer = $('#sylius-shipping-address-container');
    const toggleShippingAddress = function toggleShippingAddress() {
      shippingAddressContainer.toggle(shippingAddressCheckbox.prop('checked'));
    };
    toggleShippingAddress();
    shippingAddressCheckbox.on('change', toggleShippingAddress);
  },
});

2. Add new import in assets/shop/entry.js:

// assets/shop/entry.js
// ...
import './sylius-province-field';

3. If you're using Gulp, update your gulpfile.babel.js:

  import chug from 'gulp-chug';
+ import concat from 'gulp-concat';
  import gulp from 'gulp';
  import yargs from 'yargs';

  const { argv } = ...

+ const rootPath = argv.rootPath || 'public/assets';
+ 
  const config = [...];
    '--rootPath',
    argv.rootPath || '../../../../../../../public/assets',
    '--nodeModulesPath',
    argv.nodeModulesPath || '../../../../../../../node_modules',
  ];

  ...

  export const buildShop = ...

+ export const patchShopJs = function patchShopJs() {
+   return gulp.src([
+     `${rootPath}/shop/js/app.js`,
+     'assets/shop/sylius-province-field.js',
+   ])
+     .pipe(concat('app.js'))
+     .pipe(gulp.dest(`${rootPath}/shop/js`));
+ };
+ patchShopJs.description = 'Append shop security patches to built app.js.';

 ...

- export const build = gulp.parallel(buildAdmin, buildShop);
+ export const build = gulp.series(
+   gulp.parallel(buildAdmin, buildShop),
+   patchShopJs,
+ );

 ...

- gulp.task('shop', buildShop);
+ gulp.task('shop', gulp.series(buildShop, patchShopJs));

  ...

4. Rebuild your assets:

yarn build

Acknowledgements

This security issue has been reported by @r2tunes, thank you!

References

• The original advisory: https://github.com/advisories/GHSA-mw82-6m2g-qh6c

For more information

If you have any questions or comments about this advisory:

• Open an issue in Sylius issues
• Email us at [email protected]