XSS in Mimosa B5
CVE-2020-25205
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.009 (58.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
References
- labs.f-secure.com/advisories/ (Third Party Advisory)
- labs.f-secure.com/advisories/mimosa-ptp-devices-multiple-vulnerabilities/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-25205?
- CVE-2020-25205 is a medium-severity vulnerability in Mimosa B5, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-07-20.
- How severe is CVE-2020-25205?
- Medium severity. CVSS v3 base score is 6.1 out of 10.