What is CVE-2019-12366?

CVE-2019-12366 is a medium-severity vulnerability in 9folders Nine, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-03-18.

How severe is CVE-2019-12366?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in 9folders Nine

CVE-2019-12366

The Nine application through 4.5.3a for Android allows XSS via an event attribute and arbitrary file loading via a src attribute, if the application has the READ_EXTERNAL_STORAGE permission.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-03-18 · last modified 2026-06-17.

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: 0.010 (61.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

9folders Nine

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gubello.me (Third Party Advisory)
release-notes.9folders.com/ (Release Notes, Vendor Advisory)
www.gubello.me/blog/javascript-injection-in-six-android-mail-clients/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-12366?: CVE-2019-12366 is a medium-severity vulnerability in 9folders Nine, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-03-18.
How severe is CVE-2019-12366?: Medium severity. CVSS v3 base score is 6.1 out of 10.