Back in December we discovered an arbitrary file viewing vulnerability in the plugin WebP Express. That was finally fixed in the past few days after we once again pointed out to the people making a mess of the Plugin Directory and WordPress Support Forum that they had left a plugin they knew was vulnerable and that was being targeted by hackers in the Plugin Directory. In looking at some of the additional changes made in the new version of the plugin we noticed that while it looks like directory team required some other security changes they missed making sure basic security checks were included. Considering the previous vulnerability, it wasn’t surprising that we noticed another pretty big vulnerability had been in the plugin, which was fixed enough to stop exploitation, but not enough to properly secure it.

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This post provides insights on a vulnerability in the WordPress plugin WebP Express 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.

If you were using our service, you would have already been warned about this vulnerability if your website is vulnerable due to it. You can try out our service for free and then see the rest of the details of the vulnerability.

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