Collected research

UI Redressing Mayhem: HTTPOnly Bypass PayPwn Style

UI Redressing Mayhem: HttpOnly bypass PayPwn style

Luca De Fulgentis · blog.nibblesec.org

CVE-2012-0053 makes Apache echo request headers into a 400 error page, so an overlong cookie forces HttpOnly session cookies into readable HTML. On PayPal a history.paypal.com endpoint set an attacker-controlled monster cookie for .paypal.com in a single request, and framing the affected b.stats.paypal.com lifted the session cookies cross-domain.

Record

Document

UI Redressing Mayhem: HttpOnly bypass PayPwn style

Researcher

Luca De Fulgentis

Published by

blog.nibblesec.org

Topic

HTTP

In the archive

• Collected in the 2012 research round

Related sources

• PayPal UI-redressing proof-of-concept

Tags

• ui-redress
• cookie
• info-leak
• iframe
• cve
• sop-bypass
• case-study
• owasp-a01-2021
• owasp-a04-2021
• owasp-a07-2021

This page is the archive's own catalogue record. The research is the work of Luca De Fulgentis, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 10 August 2026.