The Tutor LMS plugin for WordPress is vulnerable to unauthorized access of data, modification of data, loss of data due to a missing capability check on multiple functions in all versions up to, and including, 2.7.0. This makes it possible for unauthenticated attackers to add, modify, or delete data.

The Tutor LMS WordPress plugin before 4.0.6 does not prevent request data from overwriting internal variables while rendering templates, allowing unauthenticated users to invoke arbitrary zero-argument PHP functions and receive their output.

The Tutor LMS plugin for WordPress is vulnerable to time-based SQL Injection via the ‘questionid’ parameter in versions up to, and including, 2.7.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Instructor-level permissions and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

The Tutor LMS Pro plugin for WordPress is vulnerable to unauthorized access of data, modification of data, loss of data due to a missing capability check on the 'getcalendarmaterials' function. The plugin is also vulnerable to SQL Injection via the ‘year’ parameter of that function due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

The Tutor LMS Pro plugin for WordPress is vulnerable to unauthorized access of data, modification of data, loss of data due to a missing capability check on the 'authenticate' function in all versions up to, and including, 2.7.0. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to gain control of an existing administrator account.

The Tutor LMS Pro – eLearning and online course solution plugin for WordPress is vulnerable to time-based SQL Injection via the ‘order’ parameter used in the getsubmittedassignments() function in all versions up to, and including, 3.7.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Tutor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. Only the Pro version is affected.

The Tutor LMS Pro plugin for WordPress is vulnerable to unauthorized access of data, modification of data, loss of data due to a missing capability check on multiple functions in all versions up to, and including, 2.7.0. This makes it possible for unauthenticated attackers to add, modify, or delete user meta and plugin options.

The Tutor LMS plugin for WordPress is vulnerable to SQL Injection via the ‘ratingfilter’ parameter in all versions up to, and including, 2.7.6 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

The Tutor LMS WordPress plugin before 3.9.13 does not, in its Droip and Kirki page-builder integration, perform the enrollment, purchase, and private-course capability checks it enforces in its core course handler, allowing authenticated users with subscriber-level access to enroll in paid or private courses without authorization, read private course content, and mark arbitrary courses as completed, on sites where the Droip or Kirki integration is active.

The Tutor LMS WordPress plugin before 4.0.6 does not validate a stored file path before using it to stream media, allowing users with the instructor role to read arbitrary files on the server, including files outside the web root.

The readable files include the WordPress configuration file, which exposes the database credentials and the authentication keys and salts, so authentication cookies can be forged.

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference to Arbitrary Course Deletion in versions up to, and including, 2.7.0 via the 'tutorcoursedelete' function due to missing validation on a user controlled key. This can allow authenticated attackers, with Instructor-level permissions and above, to delete any course.

The Tutor LMS WordPress plugin before 3.9.13 does not verify that the requesting user is allowed to edit a target post before overwriting it in one of its content-builder save handlers, authorizing the request only against an unrelated identifier, allowing authenticated users with instructor-level access to overwrite and take over any post or page on the site, including those owned by administrators.

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to generic SQL Injection via Stored Quiz Answer Array in all versions up to, and including, 4.0.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with custom-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The payload is stored at quiz-attempt time via the wpajaxtutorquizabandon handler, but the injected SQL executes only when a privileged user or Tutor REST API key holder requests the /wp-json/tutor/v1/quiz-attempt-details/{id} endpoint, making this a second-order (stored) injection chain.

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Remote Code Execution limited to zero-argument function invocation in all versions up to, and including, 4.0.5 via the tutorcoursefilterajax AJAX action. This is due to missing authorization on the handler combined with unsanitized array keys being passed to extract() inside tutorloadtemplate(), allowing attacker-controlled POST data to overwrite the local $template variable and, in the resulting templates/single-content-loader.php template, the $methodmap and $context variables invoked at $methodmap$context. This makes it possible for unauthenticated attackers to call an arbitrary zero-argument PHP function server-side and, via WordPress core edituser(), to create a persistent subscriber-level account from request parameters.

The Tutor LMS Elementor Addons plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'coursecarouselskin' attribute within the plugin's Course Carousel widget in all versions up to, and including, 2.1.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Lesson Attachment Title in all versions up to, and including, 3.9.13 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Tutor LMS Pro – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.8.3 due to missing validation on a user controlled key when viewing and editing assignments through the tutorassignmentsubmit() function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to view and edit assignment submissions of other students.

The Tutor LMS WordPress plugin before 3.9.13 does not verify ownership of the targeted quiz attempt before writing to it, allowing authenticated users with subscriber-level access and above to modify and force-complete other students' quiz attempts, overwriting their recorded marks and pass/fail result.

The Tutor LMS plugin for WordPress is vulnerable to bypass to user registration in versions up to, and including, 2.7.6. This is due to a missing check for the 'userscanregister' option in the 'registerinstructor' function. This makes it possible for unauthenticated attackers to register as the default role on the site, even if registration is disabled.

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check while verifying webhook signatures on the "verifyAndCreateOrderData" function in all versions up to, and including, 3.8.3. This makes it possible for unauthenticated attackers to bypass payment verification and mark orders as paid by submitting forged webhook requests with paymenttype set to 'recurring'.

The Tutor LMS WordPress plugin before 4.0.6 does not validate values used to build a database query, and does not restrict which template file a request may load, allowing unauthenticated users to inject SQL and to read question and answer content belonging to courses that are not publicly available.

The injected text reaches the query as grammar rather than as data, and on the database engines tested it does not yield extraction of arbitrary data, so the confidentiality impact is the disclosed course content rather than the database at large.

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.8.3. This makes it possible for authenticated attackers, with tutor-level access and above, to view assignments for courses they don't teach which may contain sensitive information.

The Tutor LMS WordPress plugin before 3.9.14 does not properly verify enrollment when restricting access to protected course content, allowing authenticated users with subscriber-level access and above who are enrolled in at least one course to view paid lesson, quiz, and assignment content belonging to other courses.

The Tutor LMS WordPress plugin before 4.0.6 does not enforce per-object ownership checks on its course content type, allowing any user with the instructor role to read the content of private courses belonging to other instructors.