CVE-2025-63040

The Post Snippets plugin for WordPress (versions up to and including 4.0.11) contains a Cross-Site Request Forgery (CSRF) vulnerability. The root cause is a lack of CSRF protection on certain actions within the plugin, enabling an attacker to craft malicious requests that operate under the identity of a higher-privileged user [1].

Exploitation requires user interaction: a privileged user (such as an administrator) must be tricked into clicking a malicious link, visiting a crafted page, or submitting a form. The attacker does not need to authenticate; instead, they rely on the victim’s active session to carry out the forged request [1].

If successfully exploited, the attacker can force the victim’s browser to execute unwanted actions within the plugin’s context, potentially leading to unauthorized changes to snippets or configuration. The impact is limited to actions the victim is allowed to perform, but could still be abused in mass-exploit campaigns targeting thousands of websites [1].

The vulnerability is fixed in version 4.0.12. Users are strongly advised to update immediately. Auto-update can be enabled for vulnerable plugins through Patchstack. If an immediate update is not possible, the advisory recommends consulting the hosting provider or a web developer for assistance [1].