Multiple cross-site scripting (XSS) vulnerabilities in Moodle 1.8.x before 1.8.12 and 1.9.x before 1.9.8 allow remote attackers to inject arbitrary web script or HTML via vectors related to (1) the Login-As feature or (2) when the global search feature is enabled, unspecified global search forms in the Global Search Engine. NOTE: vector 1 might be resultant from a cross-site request forgery (CSRF) vulnerability.

Moodle 3.x has XSS in the contact form on the "non-respondents" page in non-anonymous feedback.

It was found in Moodle before version 3.10.1 that some search inputs were vulnerable to reflected XSS due to insufficient escaping of search queries.

A flaw was found in Moodle 3.4 to 3.4.1, 3.3 to 3.3.4, 3.2 to 3.2.7, 3.1 to 3.1.10 and earlier unsupported versions. Unauthenticated users can trigger custom messages to admin via paypal enrol script. Paypal IPN callback script should only send error emails to admin after request origin was verified, otherwise admin email can be spammed.

Cross-site scripting (XSS) vulnerability in course/lib.php in Moodle 1.6 before 1.6.9, 1.7 before 1.7.7, 1.8 before 1.8.8, and 1.9 before 1.9.4 allows remote attackers to inject arbitrary web script or HTML via crafted log table information that is not properly handled when it is displayed in a log report.

Cross-site scripting (XSS) vulnerability in blocks/html/block_html.php in Snoopy 1.2.3, as used in Moodle 1.6 before 1.6.9, 1.7 before 1.7.7, 1.8 before 1.8.8, and 1.9 before 1.9.4, allows remote attackers to inject arbitrary web script or HTML via an HTML block, which is not properly handled when the "Login as" feature is used to visit a MyMoodle or Blog page.

The CSV grade import method contained an XSS risk for users importing the spreadsheet, if it contained unsafe content.

The course upload preview contained an XSS risk for users uploading unsafe data.

lib/setup.php in Moodle through 2.4.11, 2.5.x before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3 does not provide charset information in HTTP headers, which might allow remote attackers to conduct cross-site scripting (XSS) attacks via UTF-7 characters during interaction with AJAX scripts.

A vulnerability was found in Moodle 3.7 before 3.73, 3.6 before 3.6.7 and 3.5 before 3.5.9, where a reflected XSS possible from some fatal error messages.

A vulnerability was found in moodle 3.7 before 3.7.3, where there is blind XSS reflected in some locations where user email is displayed.

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

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

ID numbers displayed in the lesson overview report required additional sanitizing to prevent a stored XSS risk.

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 allows a remote attacker to perform cross-site scripting (XSS) attacks.

Insufficient escaping of calendar event titles resulted in a stored XSS risk in the event deletion prompt.

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

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 context of vulnerable website. This vulnerability may allow an attacker to perform cross-site scripting (XSS) attacks to gain access potentially sensitive information and modification of web pages.

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

The question bank filter required additional sanitizing to prevent a reflected XSS risk.

Multiple cross-site scripting (XSS) vulnerabilities in auth/db/auth.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 allow remote attackers to inject arbitrary web script or HTML via an external DB profile field.

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 of vulnerable website to steal potentially sensitive information, change appearance of the web page, can perform phishing and drive-by-download attacks.

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 in context of vulnerable website to steal potentially sensitive information, change appearance of the web page, can perform phishing and drive-by-download attacks. This vulnerability does not impact authenticated users.

Cross-site scripting (XSS) vulnerability in the advanced-search feature in mod_data in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 allows remote attackers to inject arbitrary web script or HTML via a crafted field in a URL, as demonstrated by a search form field.

In Moodle 3.x, there is XSS via a calendar event name.

Cross-site scripting (XSS) vulnerability in the search_pagination function in course/classes/management_renderer.php in Moodle 2.8.x before 2.8.10, 2.9.x before 2.9.4, and 3.0.x before 3.0.2 allows remote attackers to inject arbitrary web script or HTML via a crafted search string.

Multiple cross-site scripting (XSS) vulnerabilities in the survey module in Moodle through 2.6.11, 2.7.x before 2.7.11, 2.8.x before 2.8.9, and 2.9.x before 2.9.3 allow remote authenticated users to inject arbitrary web script or HTML by leveraging the student role and entering a crafted survey answer.

Moodle through 2.6.11, 2.7.x before 2.7.11, 2.8.x before 2.8.9, and 2.9.x before 2.9.3 does not properly restrict the availability of Flowplayer, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted .swf file.

Cross-site scripting (XSS) vulnerability in group/overview.php in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 allows remote authenticated users to inject arbitrary web script or HTML via a modified grouping description.

Cross-site scripting (XSS) vulnerability in the user_get_user_details function in user/lib.php in Moodle through 2.6.11, 2.7.x before 2.7.9, 2.8.x before 2.8.7, and 2.9.x before 2.9.1 allows remote attackers to inject arbitrary web script or HTML by leveraging absence of an external_format_text call in a web service.

Cross-site scripting (XSS) vulnerability in mod/quiz/report/statistics/statistics_question_table.php in Moodle through 2.5.9, 2.6.x before 2.6.9, 2.7.x before 2.7.6, and 2.8.x before 2.8.4 allows remote authenticated users to inject arbitrary web script or HTML by leveraging the student role for a crafted quiz response.

Cross-site scripting (XSS) vulnerability in course/pending.php in Moodle through 2.5.9, 2.6.x before 2.6.7, 2.7.x before 2.7.4, and 2.8.x before 2.8.2 allows remote authenticated users to inject arbitrary web script or HTML via a crafted course summary.

access.php in the Lesson module in Moodle 2.8.x before 2.8.2 does not set the RISK_XSS bit for graders, which allows remote authenticated users to conduct cross-site scripting (XSS) attacks via crafted essay feedback.

webservice/upload.php in Moodle 2.6.x before 2.6.6 and 2.7.x before 2.7.3 does not ensure that a file upload is for a private or draft area, which allows remote authenticated users to upload files containing JavaScript, and consequently conduct cross-site scripting (XSS) attacks, by specifying the profile-picture area.

Cross-site scripting (XSS) vulnerability in mod/feedback/mapcourse.php in the Feedback module in Moodle through 2.4.11, 2.5.x before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3 allows remote authenticated users to inject arbitrary web script or HTML by leveraging the mod/feedback:mapcourse capability to provide a searchcourse parameter.

Cross-site scripting (XSS) vulnerability in user/profile.php in Moodle through 2.3.11, 2.4.x before 2.4.11, 2.5.x before 2.5.7, 2.6.x before 2.6.4, and 2.7.x before 2.7.1 allows remote authenticated users to inject arbitrary web script or HTML via the Skype ID profile field.

Multiple cross-site scripting (XSS) vulnerabilities in the advanced-grading implementation in Moodle through 2.3.11, 2.4.x before 2.4.11, 2.5.x before 2.5.7, 2.6.x before 2.6.4, and 2.7.x before 2.7.1 allow remote authenticated users to inject arbitrary web script or HTML via a crafted (1) qualification or (2) rating field in a rubric.

Multiple cross-site scripting (XSS) vulnerabilities in admin/tool/task/scheduledtasks.php in Moodle 2.7.x before 2.7.1 allow remote attackers to inject arbitrary web script or HTML via vectors that trigger a crafted (1) error or (2) success message for a scheduled task.

Cross-site scripting (XSS) vulnerability in the get_description function in lib/classes/event/user_login_failed.php in Moodle 2.7.x before 2.7.1 allows remote attackers to inject arbitrary web script or HTML via a crafted username that is improperly handled during the logging of an invalid login attempt.

Multiple cross-site scripting (XSS) vulnerabilities in badges/renderer.php in Moodle 2.5.x before 2.5.7, 2.6.x before 2.6.4, and 2.7.x before 2.7.1 allow remote attackers to inject arbitrary web script or HTML via an external badge.

Multiple cross-site scripting (XSS) vulnerabilities in Moodle through 2.3.11, 2.4.x before 2.4.11, 2.5.x before 2.5.7, 2.6.x before 2.6.4, and 2.7.x before 2.7.1 allow remote attackers to inject arbitrary web script or HTML via vectors that trigger an AJAX exception dialog.

Cross-site scripting (XSS) vulnerability in the quiz_question_tostring function in mod/quiz/editlib.php in Moodle through 2.3.11, 2.4.x before 2.4.9, 2.5.x before 2.5.5, and 2.6.x before 2.6.2 allows remote authenticated users to inject arbitrary web script or HTML via a quiz question.

Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.

Cross-site scripting (XSS) vulnerability in the URL downloader repository in repository/url/lib.php in Moodle through 2.3.11, 2.4.x before 2.4.10, 2.5.x before 2.5.6, and 2.6.x before 2.6.3 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

The drag-and-drop onto image (ddimageortext) question type required additional sanitizing to prevent a stored XSS risk.

Multiple cross-site scripting (XSS) vulnerabilities in Flowplayer Flash before 3.2.17, as used in Moodle through 2.3.11, 2.4.x before 2.4.9, 2.5.x before 2.5.5, and 2.6.x before 2.6.2, allow remote attackers to inject arbitrary web script or HTML by (1) providing a crafted playerId or (2) referencing an external domain, a related issue to CVE-2013-7342.

Cross-site scripting (XSS) vulnerability in Moodle before 1.6.8, 1.7 before 1.7.6, 1.8 before 1.8.7, and 1.9 before 1.9.3 allows remote attackers to inject arbitrary web script or HTML via a Wiki page name (aka page title).

Cross-site scripting (XSS) vulnerability in blog/edit.php in Moodle 1.6.x before 1.6.7 and 1.7.x before 1.7.5 allows remote attackers to inject arbitrary web script or HTML via the etitle parameter (blog entry title).

A vulnerability was found in Moodle 3.9 to 3.9.1, 3.8 to 3.8.4 and 3.7 to 3.7.7 where it was possible to include JavaScript in a book's chapter title, which was not escaped on the "Add new chapter" page. This is fixed in 3.9.2, 3.8.5 and 3.7.8.

The _bad_protocol_once function in phpgwapi/inc/class.kses.inc.php in KSES, as used in eGroupWare before 1.4.003, Moodle before 1.8.5, and other products, allows remote attackers to bypass HTML filtering and conduct cross-site scripting (XSS) attacks via a string containing crafted URL protocols.