Real World Lab — What to Find
This page simulates Reddit's Shreddit API comments endpoint.
Access it using the real URL path pattern:
/59.php/svc/shreddit/api/comments/askreddit/POST_ID/t1_COMMENT_ID
The POST_ID path segment is reflected raw in an
unquoted id attribute on the
"See More Comments" button at the bottom of this page.
Unlike Labs 56–58, there are no quotes to break out of —
a single space character (%20) is
enough to inject a new attribute.
The XSS fires on mouseover — hover over the button after injecting.
Payload: t3_u9po1l%20onmouseover=alert(document.domain)%20y=