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CVE-2018-19943

Cross-site Scripting — is CVE-2018-19943real, exploitable, or a false positive? Here's the community ground truth.

High · CVSS 8EPSS 17.7%CISA KEVCWE-79 · Cross-site Scripting

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

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

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Community ground truth

Community verdict

2 verdicts
Not a real issue

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Community real-world severity: Critical (Critical 2) — CVSS base score 8

Practitioners rate this higher than its CVSS — treat with extra caution.

Field notes & remediation

Verdicts are the quick signal — notes are the evidence and fixes behind them.

  • 0
    Field note · Waleed AzizCurated

    QNAP NAS File Station Cross-Site Scripting Vulnerability — A cross-site scripting vulnerability affecting QNAP NAS File Station could allow remote attackers to inject malicious code. Listed in the CISA KEV catalog (added 2022-05-24) — confirmed exploited in the wild, not theoretical. It is linked to known ransomware campaigns. FIRST EPSS puts the chance of exploitation in the next 30 days at ~18%. Treat it as real and prioritize remediation over triage.

  • 0
    Remediation · Priya NairCurated

    Required action for QNAP Network Attached Storage (NAS): Apply updates per vendor instructions. CISA set a federal remediation due date of 2022-06-14. After patching, verify the vulnerable path is no longer reachable before closing the finding.

Same weaknessCWE-79 · Cross-site Scripting.