CVE-2018-19943 (GCVE-0-2018-19943)
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 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
Severity
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 , < 4.4.2.1270
(custom)
|
guessed | |
| QNAP Systems Inc. | QTS |
Affected:
unspecified , < 4.4.1.1261
(custom)
Affected: unspecified , < 4.3.6.1263 (custom) |
guessed | |
| QNAP Systems Inc. | QTS |
Affected:
unspecified , < 4.3.4.1282
(custom)
|
guessed | |
| QNAP Systems Inc. | QTS |
Affected:
unspecified , < 4.3.3.1252
(custom)
|
guessed | |
| QNAP Systems Inc. | QTS |
Affected:
unspecified , < 4.2.6
(custom)
|
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 275bab00-85db-48de-961e-a15bd90ce0f3
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-2018-19943
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: 8d35468b-2595-44fe-882b-6ff0497cdb41
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 these issues in... | Affected: QNAP Systems Inc. / QTS | CVSS: 8.0 (HIGH) | 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 these issues in... |
| Vendor | QNAP Systems Inc. |
| Product | QTS |
| Added Date | 2022-05-24T00:00:00.000Z |
| Cvss Score | 8.0 |
| Epss Score | None |
| Cvss Severity | HIGH |
| 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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