GHSA-gwxv-jv83-6qjr

Опубликовано: 06 июн. 2023

Источник: github

Github: Прошло ревью

CVSS3: 5.4

Описание

JStachio XSS vulnerability: Unescaped single quotes

Impact

Description:

JStachio fails to escape single quotes ' in HTML, allowing an attacker to inject malicious code.

Reproduction Steps:

Use the following template code:

Set the value variable to ' onblur='alert(1).

public class Escaping { public static void main(String[] args) { Model model = new Model("' onblur='alert(1)"); String result = AttributeTemplate.of().execute(model); System.out.println(result); } @JStache(template = "<div attr='{{value}}'></div>", name="AttributeTemplate") @JStacheConfig(contentType= Html.class) public static class Model { public final String value; public Model(String value) { this.value = value; } public String getValue() { return value; } } }

Expected Result: The resulting output should have properly escaped the single quotes and not execute the injected JavaScript code.

Actual Result: The resulting output is vulnerable and renders as follows:

Impact and Risk:

This vulnerability can be exploited by an attacker to execute arbitrary JavaScript code in the context of other users visiting pages that use this template engine. This can lead to various consequences, including session hijacking, defacement of web pages, theft of sensitive information, or even the propagation of malware.

Proposed Solution:

To mitigate this vulnerability, the template engine should properly escape special characters, including single quotes. Common practice is to escape ' as &#39.

Patches

Workarounds

As long as users stick with double quotes " for HTML attributes, they should not be affected.

References

For instance, Rocker's general purpose HTML escaping

Ссылки

Пакеты

Наименование

io.jstach:jstachio

maven

Затронутые версииВерсия исправления

< 1.0.1

1.0.1

EPSS

Процентиль: 72%

0.00707

Низкий

5.4 Medium

CVSS3

CVE ID

CVE-2023-33962

Дефекты

CWE-79

Связанные уязвимости

CVE-2023-33962

CVSS3: 5.4

nvd

больше 2 лет назад

JStachio is a type-safe Java Mustache templating engine. Prior to version 1.0.1, JStachio fails to escape single quotes `'` in HTML, allowing an attacker to inject malicious code. This vulnerability can be exploited by an attacker to execute arbitrary JavaScript code in the context of other users visiting pages that use this template engine. This can lead to various consequences, including session hijacking, defacement of web pages, theft of sensitive information, or even the propagation of malware. Version 1.0.1 contains a patch for this issue. To mitigate this vulnerability, the template engine should properly escape special characters, including single quotes. Common practice is to escape `'` as `&#39`. As a workaround, users can avoid this issue by using only double quotes `"` for HTML attributes.

EPSS

Процентиль: 72%

0.00707

Низкий

5.4 Medium

CVSS3

CVE ID

CVE-2023-33962

Дефекты

CWE-79