CVE-2018-19953 (GCVE-0-2018-19953)
Vulnerability from cvelistv5 – Published: 2020-10-28 17:55 – Updated: 2026-08-13 03:55Summary
If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build 20200107; QTS 4.3.3.1161 on build 20200109; QTS 4.2.6 on build 20200109.
Severity
6.1 (Medium)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2022-06-01 00:00 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.qnap.com/zh-tw/security-advisory/qsa-20-01 | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| QNAP Systems Inc. | QTS |
Affected:
unspecified , < 4.4.2.1231
(custom)
|
guessed | |
| QNAP Systems Inc. | QTS |
Affected:
unspecified , < 4.4.1.1201
(custom)
|
guessed | |
| QNAP Systems Inc. | QTS |
Affected:
unspecified , < 4.3.6.1218
(custom)
|
guessed | |
| QNAP Systems Inc. | QTS |
Affected:
unspecified , < 4.3.4.1190
(custom)
|
guessed | |
| QNAP Systems Inc. | QTS |
Affected:
unspecified , < 4.3.3.1161
(custom)
Affected: unspecified , < 4.2.6 (custom) |
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 33d11f8c-d2fc-4463-8571-d590f55ce540
Exploited: Yes
Timestamps
First Seen: 2022-05-24
Asserted: 2022-05-24
Scope
Notes: KEV entry: QNAP NAS File Station Cross-Site Scripting Vulnerability | Affected: QNAP / Network Attached Storage (NAS) | Description: A cross-site scripting vulnerability affecting QNAP NAS File Station could allow remote attackers to inject malicious code. | Required action: Apply updates per vendor instructions. | Due date: 2022-06-14 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2018-19953
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-79 CWE-80 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Network Attached Storage (NAS) |
| Due Date | 2022-06-14 |
| Date Added | 2022-05-24 |
| Vendorproject | QNAP |
| Vulnerabilityname | QNAP NAS File Station Cross-Site Scripting Vulnerability |
| Knownransomwarecampaignuse | Known |
References
Created: 2026-02-02 12:27 UTC
| Updated: 2026-02-06 07:17 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 400ba501-5d90-4c55-a436-e1b5956820af
Exploited: Yes
Timestamps
First Seen: 2022-05-24
Asserted: 2022-05-24
Scope
Notes: KEVIntel entry: If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed the issue in... | Affected: QNAP Systems Inc. / QTS | CVSS: 6.1 (MEDIUM) | Used in malware: yes | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Confirmed Compromise
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed the issue in... |
| Vendor | QNAP Systems Inc. |
| Product | QTS |
| Added Date | 2022-05-24T00:00:00.000Z |
| Cvss Score | 6.1 |
| Epss Score | None |
| Cvss Severity | MEDIUM |
| Epss Percentile | None |
| Used In Malware | yes |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 14:05 UTC
| Updated: 2026-07-10 06:14 UTC
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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