The web console for Mimosa B5, B5c, and C5x firmware through 2.8.0.2 is vulnerable to stored XSS in the set_banner() function of /var/www/core/controller/index.php. An unauthenticated attacker may set the contents of the /mnt/jffs2/banner.txt file, stored on the device’s filesystem, to contain arbitrary JavaScript. The file contents are then used as part of a welcome/banner message presented to unauthenticated users who visit the login page for the web console. This vulnerability does not occur in the older 1.5.x firmware versions.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25205
Reference (s):
- https://labs.f-secure.com/advisories/
- https://labs.f-secure.com/advisories/mimosa-ptp-devices-multiple-vulnerabilities/