CVE-2025-54802

Description

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.

CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
pyload-ng_project	pyload-ng	All

References

Advisories & Patches

https://github.com/pyload/pyload/commit/70a44fe02c03bce92337b5d370d2a45caa4de3d4 https://github.com/pyload/pyload/pull/4596 https://github.com/pyload/pyload/security/advisories/GHSA-48rp-jc79-2264 https://github.com/pyload/pyload/security/advisories/GHSA-48rp-jc79-2264

Exploits

https://github.com/pyload/pyload/pull/4596 https://github.com/pyload/pyload/security/advisories/GHSA-48rp-jc79-2264 https://github.com/pyload/pyload/security/advisories/GHSA-48rp-jc79-2264

Frequently Asked Questions

What is CVE-2025-54802? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-54802? +

CVE-2025-54802 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-54802? +

CVE-2025-54802 affects products from pyload-ng_project, specifically: pyload-ng. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-54802? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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