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Cross Site Scripting Vulnerability on "Manage administrators" feature in PHPList 3.5.3, 3,5.4 #671

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Songohan22 opened this issue May 29, 2020 · 1 comment

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@Songohan22
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Describe the bug
An authenticated malicious user can take advantage of a Stored XSS vulnerability in the "Manage administrators" feature.
To Reproduce
Steps to reproduce the behavior:

  1. Log into the panel.
  2. Go to "/admin/?page=admins&tk=569e1f6f9e6b3a9abd9046ff57e34aaf"
  3. Click "Manage administrators"
  4. Click "admin" edit infomation admin.
  5. Insert payload:
    "><svg/onload=alert(/XSS/)>
    image
    // # "><svg/onload=prompt(/SonGohan22/)>
  6. Click "Save Changes"
  7. View the preview to trigger XSS.
  8. View the preview to get in request and such Stored XSS

Expected behavior
The removal of script tags is not sufficient to prevent an XSS attack. You must HTML Entity encode any output that is stored back to the page.

Impact
Commonly include transmitting private data, like cookies or other session information, to the attacker, redirecting the victim to web content controlled by the attacker, or performing other malicious operations on the user’s machine under the guise of the vulnerable site.

Screenshots
image
Insert payload
image
Click "Save Changes" -> Click "List of administrator" -> View Stored XSS
image

Desktop (please complete the following information):

  • OS: Windows
  • Browser: Firefox
  • Version: 76.0.1
@michield
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Resolved with b2d581f

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2 participants