CVE-2021-4462 (GCVE-0-2021-4462)
Vulnerability from cvelistv5 – Published: 2025-11-10 22:32 – Updated: 2026-04-07 14:05 X_Known Exploited VulnerabilityTitle
Employee Records System v1.0 Arbitrary File Upload RCE
Summary
Employee Records System version 1.0 contains an unrestricted file upload vulnerability that allows a remote unauthenticated attacker to upload arbitrary files via the uploadID.php endpoint; uploaded files can be executed because the application does not perform proper server-side validation. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-06 UTC.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-12 17:33 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.sourcecodester.com/php/11393/employee… | product |
| https://www.exploit-db.com/exploits/49596 | exploit |
| https://www.vulncheck.com/advisories/employees-re… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Employee Records System | Employee Records System |
Affected:
1.0
cpe:2.3:a:employee_records_system_project:employee_records_system:1.0:*:*:*:*:*:*:* |
Date Public
2021-02-26 00:00
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c2cb8c5d-ce74-44c0-b04c-733575816bc5
Exploited: Yes
Timestamps
First Seen: 2026-01-15
Asserted: 2026-01-15
Last Seen: 2026-09-07
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: skittles / Simple Employee Records System 1.0 | Class: other-software | IoT: no | In CISA KEV: no | Honeypot connections on 2026-09-07: 2
Evidence
Type: Honeypot
Signal: In The Wild Attempts
Confidence: 70%
Source: shadowserver
Details
| 1D | 2 |
|---|---|
| Iot | no |
| Feed | Shadowserver Foundation honeypot/exploited-vulnerabilities |
| Type | http-scan |
| Class | other-software |
| 7D Avg | 3 |
| Vendor | skittles |
| 30D Avg | 1 |
| 90D Avg | 3 |
| Product | Simple Employee Records System 1.0 |
| Cisa Kev | no |
| Connections | 2 |
| Observation Date | 2026-09-07 |
| Vulnerability Class | None |
| Vulnerability Score | None |
| Vulnerability Severity | None |
References
Created: 2026-07-01 05:54 UTC
| Updated: 2026-09-09 01:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: dd74e0ba-dd74-4120-8baa-92ea884acfd2
Exploited: Yes
Timestamps
First Seen: 2026-02-26
Asserted: 2026-02-26
Scope
Notes: KEVIntel entry: Employee Records System v1.0 Arbitrary File Upload RCE | Affected: Employee Records System / Employee Records System | CVSS: 9.3 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Employee Records System v1.0 Arbitrary File Upload RCE |
| Vendor | Employee Records System |
| Product | Employee Records System |
| Added Date | 2026-02-26T00:00:00.000Z |
| Cvss Score | 9.3 |
| Epss Score | None |
| Cvss Severity | CRITICAL |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | True |
References
Created: 2026-06-19 12:42 UTC
| Updated: 2026-06-19 12:42 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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