Characters after https URI scheme which prevent URL parsing of href

⚠ Browser differences

These characters make the URI scheme parsing break and return plaintext instead of the parsed URL.

Created Oct 27, 2025

Updated Oct 27, 2025

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CategoryURL Handling

VisibilityPublic

TypeXSS

CharsetUTF-8

Template used:

<a id="user_id" href="https:$[chr]blah/../../"></a>

Code used after fuzz:

var user_id = document.getElementById("user_id");0x0D
var url = user_id.toString();0x0D
0x0D
if(url.indexOf("../") != -1) log($[i]);

Sample payloads

<a id="user_id" href="https:#blah/../../"></a>

<a id="user_id" href="https:%blah/../../"></a>

<a id="user_id" href="https:*blah/../../"></a>

<a id="user_id" href="https::blah/../../"></a>

<a id="user_id" href="https:<blah/../../"></a>

<a id="user_id" href="https:[blah/../../"></a>

<a id="user_id" href="https:|blah/../../"></a>

<a id="user_id" href="https:¨blah/../../"></a>

<a id="user_id" href="https:¯blah/../../"></a>

<a id="user_id" href="https:´blah/../../"></a>

<a id="user_id" href="https:¸blah/../../"></a>

<a id="user_id" href="https:΋blah/../../"></a>

<a id="user_id" href="https:΍blah/../../"></a>

<a id="user_id" href="https:΢blah/../../"></a>

<a id="user_id" href="https:԰blah/../../"></a>

<a id="user_id" href="https:؈blah/../../"></a>

<a id="user_id" href="https:؋blah/../../"></a>

<a id="user_id" href="https:؍blah/../../"></a>

<a id="user_id" href="https:঩blah/../../"></a>