One of the changelog entries for the latest version of Memphis Documents Library is “Update – Security fixes.” Looking at the changes made in that version we found that a nonce check was added before handling the uploading of files through the plugin. The types of files that can be uploaded is restricted, so there was previously a cross-site request forgery (CSRF)/restricted file upload vulnerability in the plugin. In determining what versions were impacted by this we found that in earlier versions the types of files that can be uploaded wasn’t restricted, so there was previously a cross-site request forgery (CSRF)/arbitrary file upload vulnerability as well.

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This post provides insights on a vulnerability in the WordPress plugin Memphis Documents Library not discovered by us, where the discoverer hadn't provided the details needed for us to confirm the vulnerability while we were adding it to the data set for our service, so the rest of its contents are limited to subscribers of our service.

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