Yahoo! Advertising Service has is vulnerable to cross-site scripting security bugs, discovered by Soumyodeep Mondal. Vulnerability is yet unfixed and exploitable using a simple payload as shown in screenshot. There is a demo video also available to show Proof of concept. Back in January, Yahoo! said that it had fixed a cross-site scripting (XSS) vulnerability in its webmail service which was blamed for a spate of account hijackings. The compromised accounts were used to send spam. Also The Yahoo! blog was vulnerable to XSS attacks because it utilized an outdated version of WordPress. DEMO VIDEO: [YOUTUBE]tFXjvqZ1Q2M[/YOUTUBE] المصدر )5:"