Impact

The gatsby-source-wordpress plugin prior to versions 4.0.8 and 5.9.2 leaks .htaccess HTTP Basic Authentication variables into the app.js bundle during build-time. Users who are not initializing basic authentication credentials in the gatsby-config.js are not affected.

Example affected gatsby-config.js:

      resolve: 'gatsby-source-wordpress',
        auth: {
          htaccess: {
            username: leaked_username
            password: leaked_password,
          },
        },

Patches

A patch has been introduced in gatsby-source-wordpress@4.0.8 and gatsby-source-wordpress@5.9.2 which mitigates the issue by filtering all variables specified in the auth: { } section. Users that depend on this functionality are advised to upgrade to the latest release of gatsby-source-wordpress, run gatsby clean followed by a gatsby build.

Workarounds

There is no known workaround at this time, other than manually editing the app.js file post-build.

For more information

Email us at security@gatsbyjs.com