{"id":63951,"date":"2025-08-10T09:40:09","date_gmt":"2025-08-10T09:40:09","guid":{"rendered":""},"modified":"2025-10-06T05:35:30","modified_gmt":"2025-10-06T11:35:30","slug":"cve-2025-54802-critical-path-traversal-vulnerability-in-pyload-enabling-remote-code-execution","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-54802-critical-path-traversal-vulnerability-in-pyload-enabling-remote-code-execution\/","title":{"rendered":"CVE-2025-54802: Critical Path Traversal Vulnerability in pyLoad Enabling Remote Code Execution<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The cybersecurity community has recently identified a severe vulnerability, designated as CVE-2025-54802, affecting pyLoad, the free and open-source download manager written in pure Python. This vulnerability can be exploited by potential attackers to compromise systems and leak data by enabling remote code execution (RCE). Particularly, pyLoad versions 0.5.0b3.dev89 and below are susceptible to this vulnerability<\/a>, making it an urgent matter for users to update to the latest version or apply the necessary patches.
\nThe severity of this vulnerability<\/a> is underscored by its CVSS Severity Score, which is 9.8, indicating a critical level of risk. The vulnerability poses a significant threat as it allows unauthenticated<\/a> attackers to write arbitrary files outside the designated storage directory, potentially leading to a system-wide compromise.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-54802
\nSeverity: Critical (9.8 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Remote Code Execution, Privilege Escalation<\/a>, Potential System Compromise, and Data Leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

pyLoad | 0.5.0b3.dev89 and below<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability lies in the ‘addcrypted’ endpoint<\/a> of pyload-ng. Here, an unsafe path construction vulnerability allows an attacker to exploit path traversal<\/a>. By manipulating the ‘package’ parameter, an attacker can write arbitrary files<\/a> outside the designated storage directory. This can be abused to overwrite critical system files, including cron jobs and systemd services, leading to privilege<\/a> escalation and remote code execution as root.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Note that the following is a hypothetical example illustrating how an attacker might exploit the vulnerability<\/a>:<\/p>\n

POST \/addcrypted HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"package\": \"..\/..\/..\/..\/etc\/passwd\" }<\/code><\/pre>\n
In this example, the attacker is using a path traversal attack to overwrite the `\/etc\/passwd` file, a critical system file in Unix-based systems, potentially granting them unauthorized root access<\/a>.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
Users are advised to update to version 0.5.0b3.dev90 or later as this issue has been fixed in these versions. If updating is not immediately possible, consider implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. Regularly monitor your system logs for any suspicious activity and always maintain a strong, up-to-date backup of your critical data<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity community has recently identified a severe vulnerability, designated as CVE-2025-54802, affecting pyLoad, the free and open-source download manager written in pure Python. This vulnerability can be exploited by potential attackers to compromise systems and leak data by enabling remote code execution (RCE). Particularly, pyLoad versions 0.5.0b3.dev89 and below are susceptible to this […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[85,76,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-63951","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-directory-traversal","attack_vector-privilege-escalation","attack_vector-rce"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t