CVE-2020-2503CWE-749CWE-79CWE-80

Stored cross-site scripting vulnerability in QES

Critical · published December 24, 2020

CVSS v3.1
9.0
EPSS
1%
Percentile
55.8
In the wild
Unconfirmed
What it is

🚨 A crafty attacker could inject malicious scripts into your File Station with this stored XSS flaw, and it’s lurking in QNAP devices! 🔥 Think of it like a diner where someone has slipped a poison recipe into the chef’s special — the chef doesn’t know it’s there, so they serve it right up! If exploited, this vulnerability could allow attackers to execute harmful code, compromising the integrity of your files and potentially leading to data breaches. It’s like opening the door wide to unwanted guests who can meddle with your precious data!

Put simply

Think of it like a diner where someone has slipped a poison recipe into the chef’s special — the chef doesn’t know it’s there, so they serve it right up! This stored cross-site scripting (XSS) vulnerability enables attackers to inject malicious scripts into the File Station interface, affecting users who access the compromised site.

What to do

If exploited, this vulnerability could allow attackers to execute harmful code, compromising the integrity of your files and potentially leading to data breaches. It’s like opening the door wide to unwanted guests who can meddle with your precious data! To protect yourself, immediately update to QES 2.1.1 Build 20201006 or later. Additionally, review your application settings and ensure that only trusted sources can interact with your File Station. Don't wait! You've got this! Follow these steps and secure your QNAP devices. 🛡️

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00789 · 55.8th percentile
Weaknesses
CWE-749 · Exposed Dangerous Method or Function; CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'); CWE-80 · Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Published
2020-12-24T01:39Z
EPSS history
Timeline
  • 24 DEC 01:39Z
    Stored cross-site scripting vulnerability in QES
    cvelistv5