CVE-2026-39991CWE-79cross-site-scripting

CVE-2026-39991

published October 15, 2026

CVSS
4.8
EPSS
0%
Percentile
20.7
In the wild
Unconfirmed
What it is

A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code.

We have already fixed the vulnerability in the following version:

Notes Station 3 3.9.12 and later

The record
Technical detail
CVSS
4.8 · NONE
CVSS v4.0
4.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00293 · 20.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-15T14:17Z
References (1)
https://www.qnap.com/en/app-release-notes?keyword=Notes%20Station%203&app=NotesStation3&product-line=nas · [email protected]
EPSS history
Timeline
  • 16 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 15 OCT 09:37Z
    Stored Cross-Site Scripting (XSS) in Note Station file upload functionality
    cvelistv5
  • 15 OCT 09:37Z
    Stored Cross-Site Scripting (XSS) in Note Station file upload functionality
    cvelistv5