What is a risk of setting explicit deny permissions in a Sitecore role?

Setting explicit deny permissions in a Sitecore role can override other high-level permissions, and this is a critical aspect to understand about permission management. When deny permissions are established, they take precedence over allow permissions, regardless of the level at which those permissions were granted. This means that even if a user or role is granted access through a higher-level permission, the explicit deny will block that access, which can lead to unexpected access issues.

It's essential to manage deny permissions carefully because they can create complexities in your permission structure. If not properly considered, this can lead to confusion regarding user access and can complicate troubleshooting efforts. Understanding this mechanism is crucial for effectively managing permissions within Sitecore.

The other choices highlight potential concerns with permission management, but they do not specifically address the overriding nature of deny permissions, which is the central issue at hand.