Moodle Security Vulnerabilities

CVE-2021-36402

In Moodle, Users' names required additional sanitizing in the account confirmation email, to prevent a self-registration phishing risk.

CVE-2021-36403

In Moodle, in some circumstances, email notifications of messages could have the link back to the original message hidden by HTML, which may pose a phishing risk.

CVE-2021-36568

In certain Moodle products after creating a course, it is possible to add in a arbitrary "Topic" a resource, in this case a "Database" with the type "Text" where its values "Field name" and "Field description" are vulnerable to Cross Site Scripting Stored(XSS). This affects Moodle 3.11 and Moodle 3...

CVE-2021-3943

A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A remote code execution risk when restoring backup files was identified.

CVE-2021-40691

A session hijack risk was identified in the Shibboleth authentication plugin.

CVE-2021-40692

Insufficient capability checks made it possible for teachers to download users outside of their courses.

CVE-2021-40693

An authentication bypass risk was identified in the external database authentication functionality, due to a type juggling vulnerability.

CVE-2021-40694

Insufficient escaping of the LaTeX preamble made it possible for site administrators to read files available to the HTTP server system account.

CVE-2021-40695

It was possible for a student to view their quiz grade before it had been released, using a quiz web service.

CVE-2021-43558

A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A URL parameter in the filetype site administrator tool required extra sanitizing to prevent a reflected XSS risk.

CVE-2021-43559

A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. The "delete related badge" functionality did not include the necessary token check to prevent a CSRF risk.

CVE-2021-43560

A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. Insufficient capability checks made it possible to fetch other users' calendar action events.

CVE-2022-0332

A flaw was found in Moodle in versions 3.11 to 3.11.4. An SQL injection risk was identified in the h5p activity web service responsible for fetching user attempt data.

CVE-2022-0333

A flaw was found in Moodle in versions 3.11 to 3.11.4, 3.10 to 3.10.8, 3.9 to 3.9.11 and earlier unsupported versions. The calendar:manageentries capability allowed managers to access or modify any calendar event, but should have been restricted from accessing user level events.

CVE-2022-0334

A flaw was found in Moodle in versions 3.11 to 3.11.4, 3.10 to 3.10.8, 3.9 to 3.9.11 and earlier unsupported versions. Insufficient capability checks could lead to users accessing their grade report for courses where they did not have the required gradereport/user:view capability.

CVE-2022-0335

A flaw was found in Moodle in versions 3.11 to 3.11.4, 3.10 to 3.10.8, 3.9 to 3.9.11 and earlier unsupported versions. The "delete badge alignment" functionality did not include the necessary token check to prevent a CSRF risk.

CVE-2022-0983

An SQL injection risk was identified in Badges code relating to configuring criteria. Access to the relevant capability was limited to teachers and managers by default.

CVE-2022-0984

Users with the capability to configure badge criteria (teachers and managers by default) were able to configure course badges with profile field criteria, which should only be available for site badges.

CVE-2022-0985

Insufficient capability checks could allow users with the moodle/site:uploadusers capability to delete users, without having the necessary moodle/user:delete capability.

CVE-2022-2986

Enabling and disabling installed H5P libraries did not include the necessary token to prevent a CSRF risk.

CVE-2022-30596

A flaw was found in moodle where ID numbers displayed when bulk allocating markers to assignments required additional sanitizing to prevent a stored XSS risk.

CVE-2022-30597

A flaw was found in moodle where the description user field was not hidden when being set as a hidden user field.

CVE-2022-30598

A flaw was found in moodle where global search results could include author information on some activities where a user may not otherwise have access to it.

CVE-2022-30599

A flaw was found in moodle where an SQL injection risk was identified in Badges code relating to configuring criteria.

CVE-2022-30600

A flaw was found in moodle where logic used to count failed login attempts could result in the account lockout threshold being bypassed.

CVE-2022-35649

The vulnerability was found in Moodle, occurs due to improper input validation when parsing PostScript code. An omitted execution parameter results in a remote code execution risk for sites running GhostScript versions older than 9.50. Successful exploitation of this vulnerability may result in com...

CVE-2022-35650

The vulnerability was found in Moodle, occurs due to input validation error when importing lesson questions. This insufficient path checks results in arbitrary file read risk. This vulnerability allows a remote attacker to perform directory traversal attacks. The capability to access this feature i...

CVE-2022-35651

A stored XSS and blind SSRF vulnerability was found in Moodle, occurs due to insufficient sanitization of user-supplied data in the SCORM track details. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context ...

CVE-2022-35652

An open redirect issue was found in Moodle due to improper sanitization of user-supplied data in mobile auto-login feature. A remote attacker can create a link that leads to a trusted website, however, when clicked, it redirects the victims to arbitrary URL/domain. Successful exploitation of this v...

CVE-2022-35653

A reflected XSS issue was identified in the LTI module of Moodle. The vulnerability exists due to insufficient sanitization of user-supplied data in the LTI module. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser...

CVE-2022-39183

Moodle Plugin - SAML Auth may allow Open Redirect through unspecified vectors.

CVE-2022-40208

In Moodle, insufficient limitations in some quiz web services made it possible for students to bypass sequential navigation during a quiz attempt.

CVE-2022-40313

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

CVE-2022-40314

A remote code execution risk when restoring backup files originating from Moodle 1.9 was identified.

CVE-2022-40315

A limited SQL injection risk was identified in the "browse list of users" site administration page.

CVE-2022-40316

The H5P activity attempts report did not filter by groups, which in separate groups mode could reveal information to non-editing teachers about attempts/users in groups they should not have access to.

CVE-2022-45149

A vulnerability was found in Moodle which exists due to insufficient validation of the HTTP request origin in course redirect URL. A user's CSRF token was unnecessarily included in the URL when being redirected to a course they have just restored. A remote attacker can trick the victim to visit a s...

CVE-2022-45150

A reflected cross-site scripting vulnerability was discovered in Moodle. This flaw exists due to insufficient sanitization of user-supplied data in policy tool. An attacker can trick the victim to open a specially crafted link that executes an arbitrary HTML and script code in user's browser in con...

CVE-2022-45151

The stored-XSS vulnerability was discovered in Moodle which exists due to insufficient sanitization of user-supplied data in several "social" user profile fields. An attacker could inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

CVE-2022-45152

A blind Server-Side Request Forgery (SSRF) vulnerability was found in Moodle. This flaw exists due to insufficient validation of user-supplied input in LTI provider library. The library does not utilise Moodle's inbuilt cURL helper, which resulted in a blind SSRF risk. An attacker can send a specia...

CVE-2023-1402

The course participation report required additional checks to prevent roles being displayed which the user did not have access to view.

CVE-2023-23921

The vulnerability was found Moodle which exists due to insufficient sanitization of user-supplied data in some returnurl parameters. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable websit...

CVE-2023-23922

The vulnerability was found Moodle which exists due to insufficient sanitization of user-supplied data in blog search. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website. This flaw a...

CVE-2023-23923

The vulnerability was found Moodle which exists due to insufficient limitations on the "start page" preference. A remote attacker can set that preference for another user. The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

CVE-2023-28329

Insufficient validation of profile field availability condition resulted in an SQL injection risk (by default only available to teachers and managers).

CVE-2023-28330

Insufficient sanitizing in backup resulted in an arbitrary file read risk. The capability to access this feature is only available to teachers, managers and admins by default.

CVE-2023-28331

Content output by the database auto-linking filter required additional sanitizing to prevent an XSS risk.

CVE-2023-28332

If the algebra filter was enabled but not functional (eg the necessary binaries were missing from the server), it presented an XSS risk.

CVE-2023-28333

The Mustache pix helper contained a potential Mustache injection risk if combined with user input (note: This did not appear to be implemented/exploitable anywhere in the core Moodle LMS).

CVE-2023-28334

Authenticated users were able to enumerate other users' names via the learning plans page.