The Subscribe to Comments plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.3. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

Insertion of Sensitive Information into Log File vulnerability in WPKube Subscribe To Comments Reloaded.This issue affects Subscribe To Comments Reloaded: from n/a through 220725.

A vulnerability, which was classified as problematic, was found in Subscribe to Comments Plugin up to 2.0.7 on WordPress. This affects an unknown part of the file subscribe-to-comments.php. The manipulation leads to cross site scripting. It is possible to initiate the attack remotely. Upgrading to version 2.0.8 is able to address this issue. The identifier of the patch is 9683bdf462fcac2f32b33be98f0b96497fbd1bb6. It is recommended to upgrade the affected component. The identifier VDB-222321 was assigned to this vulnerability.

Multiple (13x) Cross-Site Request Forgery (CSRF) vulnerabilities in WPKube's Subscribe To Comments Reloaded plugin <= 211130 on WordPress allows attackers to clean up Log archive, download system info file, plugin system settings, plugin options settings, generate a new key, reset all options, change notifications settings, management page settings, comment form settings, manage subscriptions > mass update settings, manage subscriptions > add a new subscription, update subscription, delete Subscription.

Cross-site request forgery (CSRF) vulnerability in the Subscribe To Comments Reloaded plugin before 140219 for WordPress allows remote attackers to hijack the authentication of administrators for requests that conduct cross-site scripting (XSS) attacks via a request to the subscribe-to-comments-reloaded/options/index.php page to wp-admin/admin.php.