CVE-2024-50623 (GCVE-0-2024-50623)
Vulnerability from cvelistv5 – Published: 2024-10-27 00:00 – Updated: 2026-07-31 03:55Summary
In Cleo Harmony before 5.8.0.21, VLTrader before 5.8.0.21, and LexiCom before 5.8.0.21, there is an unrestricted file upload and download that could lead to remote code execution.
Severity
9.8 (Critical)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-13 00:00 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://support.cleo.com/hc/en-us/articles/271402… | |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 8f18b409-2fe2-4e5f-9b23-3598da90f0a0
Exploited: Yes
Timestamps
First Seen: 2024-12-13
Asserted: 2024-12-13
Scope
Notes: Cleo Multiple Products Unrestricted File Upload Vulnerability | Affected: Cleo / Multiple Products | Description: Cleo Harmony, VLTrader, and LexiCom, which are managed file transfer products, contain an unrestricted file upload and download vulnerability that can lead to remote code execution with elevated privileges. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2025-01-03 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://support.cleo.com/hc/en-us/articles/28408134019735-Cleo-Product-Security-Update ; https://nvd.nist.gov/vuln/detail/CVE-2024-50623
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-434 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Multiple Products |
| Due Date | 2025-01-03 |
| Date Added | 2024-12-13 |
| Vendorproject | Cleo |
| Vulnerabilityname | Cleo Multiple Products Unrestricted File Upload Vulnerability |
| Knownransomwarecampaignuse | Known |
References
Created: 2026-10-02 08:09 CEST
| Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 722cace8-330f-473a-8969-907457b56259
Exploited: Yes
Timestamps
First Seen: 2024-12-13
Asserted: 2024-12-13
Scope
Notes: In Cleo Harmony before 5.8.0.21, VLTrader before 5.8.0.21, and LexiCom before 5.8.0.21, there is an unrestricted file upload and download that... | Affected: Cleo / ["Harmony", "VLTrader", "LexiCom"] | CVSS: 9.8 (CRITICAL) | EPSS: 0.98607 | Used in malware: yes | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Confirmed Compromise
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | In Cleo Harmony before 5.8.0.21, VLTrader before 5.8.0.21, and LexiCom before 5.8.0.21, there is an unrestricted file upload and download that... |
| Cve Id | CVE-2024-50623 |
| Vendor | Cleo |
| Ghsa Id | None |
| Product | ["Harmony", "VLTrader", "LexiCom"] |
| Added Date | 2024-12-13T00:00:00.000Z |
| Cvss Score | 9.8 |
| Epss Score | 0.98607 |
| Previous Ids | |
| Cvss Severity | CRITICAL |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.99922 |
| Used In Malware | yes |
| Vulnerability Id | CVE-2024-50623 |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-10-02 09:11 CEST
| Updated: 2026-10-02 09:11 CEST
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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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