Is Seraphinite Accelerator safe? Known vulnerabilities and latest version

The Seraphinite Accelerator plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.29.24 via the WP_Object_Cache::_getFilePath. This makes it possible for unauthenticated attackers to extract complete WordPress user records — including plaintext user_login, user_email, hashed user_pass, and user_activation_key — from predictable gzip-serialized cache files at wp-content/cache/seraphinite-accelerator/oc/g/users/g/<USER_ID>.dat.gz. This vulnerability is only exploitable when the plugin's Object Cache feature is enabled, and requires the attacker to first trigger caching of the target user record (e.g., via an unauthenticated REST API request) before retrieving the resulting cache file.

The Seraphinite Accelerator WordPress plugin before 2.29.24 does not perform a capability check on one of its state-update AJAX actions, allowing authenticated users such as subscribers to write a malformed value that causes an uncaught error on every subsequent admin page load, making the entire admin area inaccessible to all administrators (denial of service).

The Seraphinite Accelerator plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'seraph_accel_prep' parameter in versions up to, and including, 2.29.15. This is due to the CacheExtractPreparePageParams() function using PHP's loose inequality operator (!=) to compare the expected HMAC string against the JSON-decoded 'nonce' value — supplying the JSON boolean true causes any non-empty HMAC string to compare as loosely equal, bypassing the signature check — combined with insufficient output escaping in the _CbContentFinishSkip() function, which concatenates the attacker-controlled 'selfTest' field directly into the HTML response body. 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 specially crafted link.

The Seraphinite Accelerator plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `seraph_accel_api` AJAX action with `fn=LogClear` in all versions up to, and including, 2.28.14. This makes it possible for authenticated attackers, with Subscriber-level access and above, to clear the plugin's debug/operational logs.

The Seraphinite Accelerator plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.28.14 via the `seraph_accel_api` AJAX action with `fn=GetData`. This is due to the `OnAdminApi_GetData()` function not performing any capability checks. This makes it possible for authenticated attackers, with Subscriber-level access and above, to retrieve sensitive operational data including cache status, scheduled task information, and external database state.

Missing Authorization vulnerability in Seraphinite Solutions Seraphinite Accelerator seraphinite-accelerator allows Retrieve Embedded Sensitive Data.This issue affects Seraphinite Accelerator: from n/a through <= 2.22.15.

The Seraphinite Accelerator plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.27.21. This is due to missing or incorrect nonce validation on the 'OnAdminApi_CacheOpBegin' function. This makes it possible for unauthenticated attackers to perform several administrative actions, including deleting the cache, via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Insertion of Sensitive Information into Log File vulnerability in Seraphinite Solutions Seraphinite Accelerator.This issue affects Seraphinite Accelerator: from n/a through 2.20.47.

The Seraphinite Accelerator plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.20.52 via the OnAdminApi_HtmlCheck function. This makes it possible for authenticated attackers, with subscriber-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Seraphinite Solutions Seraphinite Accelerator allows Reflected XSS.This issue affects Seraphinite Accelerator: from n/a through 2.20.28.

The Seraphinite Accelerator WordPress plugin before 2.20.32 does not have authorisation and CSRF checks when resetting and importing its settings, allowing unauthenticated users to reset them

The Seraphinite Accelerator WordPress plugin before 2.2.29 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

The Seraphinite Accelerator WordPress plugin before 2.2.29 does not validate the URL to redirect any authenticated user to, leading to an arbitrary redirect