Moodle Cross-Site Scripting (XSS) Vulnerability in mod/quiz/report/statistics/statistics_question_table.php

moodle/moodle Updated 02 Oct 2025

Summary

13/05/2022

Disclosed on

CVE-2015-2273

CVE

Yes i

Fix available

Low

Severity

Not published

CVSS Score

CVE-2015-2273: Moodle cross-site scripting (XSS) vulnerability. Affects moodle/moodle across 3 version ranges.

< 2.6.9 >= 2.7.0, < 2.7.6 >= 2.8.0, < 2.8.4

Fixed in 2.6.9, 2.7.6 or 2.8.4, depending on the release line you run. How to fix ↓

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Background

Moodle is an open-source learning management system (LMS) used by educational institutions worldwide. It provides a platform for creating and managing online courses, quizzes, and assessments. The mod/quiz/report/statistics/statistics_question_table.php file in Moodle versions 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 is vulnerable to a cross-site scripting (XSS) attack. This vulnerability allows remote authenticated users with the student role to inject arbitrary web script or HTML into the system by exploiting a flaw in the handling of crafted quiz responses.

Vulnerability Detail

The cross-site scripting (XSS) vulnerability in Moodle's mod/quiz/report/statistics/statistics_question_table.php file allows an attacker to inject malicious code or HTML into the system. By leveraging the student role, a remote authenticated user can submit a specially crafted quiz response that includes the malicious payload. When this response is processed and displayed in the statistics_question_table.php page, the injected code is executed in the context of other users who view the page. This can lead to various attacks, such as stealing sensitive information, session hijacking, or defacing the Moodle site.

How To Fix

Fixed versions by release line

The minimum fixed version depends on the release line you run.

< 2.6.9 2.6.9
```
composer require moodle/moodle:2.6.9
```
>= 2.7.0, < 2.7.6 2.7.6
```
composer require moodle/moodle:2.7.6
```
>= 2.8.0, < 2.8.4 2.8.4
```
composer require moodle/moodle:2.8.4
```

Tip — Not sure which release line you're on? Vulert can find the fix for the version you are using. Scan free →

Workaround

If upgrading to the latest version of Moodle is not immediately possible, a temporary workaround is to disable the mod/quiz/report/statistics/statistics_question_table.php page or restrict access to it. This can be achieved by modifying the Moodle configuration or using access control mechanisms provided by the web server. However, this workaround may limit the functionality of the statistics reporting feature.

Conclusion

The cross-site scripting (XSS) vulnerability in Moodle's mod/quiz/report/statistics/statistics_question_table.php file poses a risk to the confidentiality, integrity, and availability of Moodle installations. It is crucial to upgrade to the latest version of Moodle or apply the provided workaround to mitigate the risk. For further assistance in addressing this vulnerability, please contact DevNack.com.

See every vulnerability recorded for moodle/moodle →

FAQ

What is cross-site scripting (XSS)?

Cross-site scripting (XSS) is a type of security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. These scripts can be used to steal sensitive information, manipulate website content, or perform other malicious actions.