What is the CVSS score of CVE-2025-54802?

CVE-2025-54802 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.1%.

Which versions of Python are affected by CVE-2025-54802?

Organizations using pure Python. In face critical risk from CVE-2025-54802, a path traversal vulnerability rated CVSS 9.8.. A patch is available.

Is there a public PoC exploit available for CVE-2025-54802?

Yes, a public proof-of-concept exploit is available for CVE-2025-54802. Prioritise patching immediately. EPSS: 1.1%.

How to fix or mitigate CVE-2025-54802?

Within 24 hours: Identify all affected systems running pure Python. In and apply vendor patches immediately. Review file handling controls and restrict upload directories.

Python CVE-2025-54802

CRITICAL

Path Traversal (CWE-22)

2025-08-05 security-advisories@github.com

Privilege Escalation RCE Python Path Traversal Pyload Ng Pyload Ng Project

9.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:05 vuln.today

Patch released

Mar 28, 2026 - 19:05 nvd

Patch available

PoC Detected

Oct 09, 2025 - 17:32 vuln.today

Public exploit code

CVE Published

Aug 05, 2025 - 01:15 nvd

CRITICAL 9.8

DescriptionGitHub Advisory

pyLoad is the free and open-source Download Manager written in pure Python. In versions 0.5.0b3.dev89 and below, there is an opportunity for path traversal in pyLoad-ng CNL Blueprint via package parameter, allowing Arbitrary File Write which leads to Remote Code Execution (RCE). The addcrypted endpoint in pyload-ng suffers from an unsafe path construction vulnerability, allowing unauthenticated attackers to write arbitrary files outside the designated storage directory. This can be abused to overwrite critical system files, including cron jobs and systemd services, leading to privilege escalation and remote code execution as root. This issue is fixed in version 0.5.0b3.dev90.

AnalysisAI

pyLoad is the free and open-source Download Manager written in pure Python. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Path Traversal (CWE-22), which allows attackers to access files and directories outside the intended path. pyLoad is the free and open-source Download Manager written in pure Python. In versions 0.5.0b3.dev89 and below, there is an opportunity for path traversal in pyLoad-ng CNL Blueprint via package parameter, allowing Arbitrary File Write which leads to Remote Code Execution (RCE). The addcrypted endpoint in pyload-ng suffers from an unsafe path construction vulnerability, allowing unauthenticated attackers to write arbitrary files outside the designated storage directory. This can be abused to overwrite critical system files, including cron jobs and systemd services, leading to privilege escalation and remote code execution as root. This issue is fixed in version 0.5.0b3.dev90. Affected products include: Pyload-Ng Project Pyload-Ng. Version information: version 0.5.0.

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.