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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