A security expert has identified a cross-site scripting (XSS) vulnerability that affected hundreds of Yahoo pages. Fortunately, Yahoo has quickly addressed the issue. According to Behrouz Sadeghipour, the researcher who identified the flaw, some popular Yahoo services were affected, including Travel, Food, Security, Developer, News, Weather, Shopping, Celebrity, TV, Music and Finance. The vulnerability impacted the comments section of these pages. An attacker simply needed to post a co…