Pyload
CVE-2023-47890
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK
2 techniques across 2 tactics: Discovery, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.34%. |
| Exploit ScenarioDerived | A remote attacker could access files and directories outside the intended path by sending crafted requests to the affected application. |
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Alert meAnalysisAIv1 – Mar 28, 2026
pyLoad 0.5.0 is vulnerable to Unrestricted File Upload. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
Earlier versions of this analysis (1)
File upload in pyLoad.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Validate and canonicalize file paths. Use chroot or sandboxing. Reject input containing path separators or '../' sequences.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in pypi
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Path Traversal (CWE-22), which allows attackers to access files and directories outside the intended path. Affected products include: Pyload.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
3DescriptionNVD
pyLoad 0.5.0 is vulnerable to Unrestricted File Upload.
Executive ViewAI
Organizations using pyLoad 0.5.0 face significant risk from CVE-2023-47890, a path traversal vulnerability rated CVSS 8.8. This could allow attackers to access or modify files outside intended directories, potentially exposing sensitive configuration or credentials. Proof-of-concept code is publicly available, increasing the risk of exploitation. Organizations should apply vendor updates when available and consider compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Restrict file upload functionality via WAF; (2) Implement allowlist-based file type validation; (3) Use chroot/containerization to limit filesystem access.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.
Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.
Affected Products (CPE)NVD
pyLoad download manager version prior to 0.5.0b3.dev77 exposes the Flask SECRET_KEY through an unauthenticated endpoint.
pyLoad is the free and open-source Download Manager written in pure Python. Rated medium severity (CVSS 5.3), this vulne
Code Injection in GitHub repository pyload/pyload prior to 0.5.0b3.dev31. Rated critical severity (CVSS 9.8), this vulne
Excessive Attack Surface in GitHub repository pyload/pyload prior to 0.5.0b3.dev41. Rated critical severity (CVSS 9.8),
Improper Input Validation in GitHub repository pyload/pyload prior to 0.5.0b3.dev40. Rated high severity (CVSS 7.5), thi
Improper Certificate Validation in GitHub repository pyload/pyload prior to 0.5.0b3.dev44. Rated high severity (CVSS 7.4
pyload is an open-source Download Manager written in pure Python. Rated high severity (CVSS 7.2), this vulnerability is
Insufficient Session Expiration in GitHub repository pyload/pyload prior to 0.5.0b3.dev36. Rated medium severity (CVSS 6
An open redirection vulnerability exists in pyload/pyload version 0.5.0. Rated medium severity (CVSS 6.1), this vulnerab
pyLoad is an open-source Download Manager written in pure Python. Rated medium severity (CVSS 6.1), this vulnerability i
Cross-site Scripting (XSS) - Stored in GitHub repository pyload/pyload prior to 0.5.0b3.dev42. Rated medium severity (CV
Sensitive Cookie in HTTPS Session Without 'Secure' Attribute in GitHub repository pyload/pyload prior to 0.5.0b3.dev32.
Exploit-DB