CVE-2017-6909: Shishnet Shimmie

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue was discovered in Shimmie <= 2.5.1. The vulnerability exists due to insufficient filtration of user-supplied data (log) passed to the "shimmie2-master/ext/chatbox/history/index.php" URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website.

Affected products

• Shishnet Shimmie: up to and including 2.5.1

Published 2017-03-15. Last modified 2026-06-17.