CVE-2018-19943

What it is

If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed these issues in the following QTS versions. QTS 4.4.2.1270 build 20200410 and later QTS 4.4.1.1261 build 20200330 and later QTS 4.3.6.1263 build 20200330 and later QTS 4.3.4.1282 build 20200408 and later QTS 4.3.3.1252 build 20200409 and later QTS 4.2.6 build 20200421 and later

At a glance

Exploitability

Can be exploited over the network with a low-privilege account, but needs a user to act. High risk of data exposure, data tampering, service disruption.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2018-12-07 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2020-10-28 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2022-05-24 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
4. 2022-06-14 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-08-13 05:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
• Exploit odds: 22.7% in the next 30 days (EPSS).
• Severity: 8.0 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2020-10-28 18:15 UTC

Last modified

2026-08-13 05:17 UTC

Added to CISA KEV

2022-05-24

Exploit probability

22.7% · EPSS, next 30 days

Weakness

CWE-79 · Cross-site scripting

Record status

Analyzed

Affected

• Qnap Qts < 4.2.6
• Qnap Qts < 4.3.3.1252
• Qnap Qts < 4.3.4.1282
• Qnap Qts < 4.3.6.1263
• Qnap Qts < 4.4.1.1261
• Qnap Qts < 4.4.2.1270
• Qnap Qts 4.2.6

Attack profile CVSS 3.1 · 8.0

Attack vector

Network

Complexity

High

Privileges needed

Low

User interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2018-19943.md and follow it. Check whether this project is affected by CVE-2018-19943. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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