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PatchSiren cyber security CVE debrief

CVE-2018-19953 QNAP CVE debrief

CVE-2018-19953 is a cross-site scripting vulnerability affecting QNAP NAS File Station. CISA lists it in the Known Exploited Vulnerabilities catalog and marks known ransomware campaign use, so unpatched or exposed QNAP NAS environments should treat remediation as urgent.

Vendor
QNAP
Product
Network Attached Storage (NAS)
CVSS
MEDIUM 6.1
CISA KEV
Listed
Original CVE published
2022-05-24
Original CVE updated
2022-05-24
Advisory published
2022-05-24
Advisory updated
2022-05-24

Who should care

QNAP NAS administrators, IT and security teams managing File Station deployments, and incident responders responsible for internet-exposed or business-critical NAS systems.

Technical summary

The vulnerability is identified as a cross-site scripting issue in QNAP NAS File Station. In practical terms, maliciously crafted web content can be handled by the application in a way that results in script execution in a user's browser context. The supplied sources do not provide an affected version range or exploit details, but CISA's KEV listing indicates known exploitation and directs defenders to apply vendor updates.

Defensive priority

Urgent

Recommended defensive actions

  • Apply QNAP vendor updates and follow the vendor's remediation instructions as soon as possible.
  • Prioritize any internet-exposed NAS or administrative interfaces for immediate patching and verification.
  • Restrict File Station and NAS management access to trusted users and networks until remediation is complete.
  • Review authentication, access, and application logs for suspicious activity; investigate promptly if compromise is suspected.

Evidence notes

CISA's KEV entry names the issue 'QNAP NAS File Station Cross-Site Scripting Vulnerability,' lists vendor QNAP and product 'Network Attached Storage (NAS),' sets dateAdded to 2022-05-24 with dueDate 2022-06-14, marks 'knownRansomwareCampaignUse' as 'Known,' and says 'Apply updates per vendor instructions.' The official CVE and NVD pages are included as corroborating references.

Sources and references

Verified primary and authoritative sources

  • CVE-2018-19953 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2018-19953

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2018-19953 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2018-19953

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.