CVE-2025-54802Public exploitNetwork attack vector

Unauthenticated code execution via unsafe path construction

Published Aug 5, 2025 · Updated Aug 5, 2025

Path traversal in pyLoad 0.5.0b3.dev89 and earlier allows remote attackers to write arbitrary files through the CNL web endpoint. The addcrypted handler joins a package-derived filename to the storage path and writes supplied content without verifying that the resolved path remains inside that directory. An unauthenticated POST can overwrite service files, including Linux cron jobs or systemd units, and execute code with the pyLoad service account's privileges.

CVSS severity9.8
Critical
EPSS probability1.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in pyLoad 0.5.0b3.dev89 and earlier allows remote attackers to write arbitrary files through the CNL web endpoint. The addcrypted handler joins a package-derived filename to the storage path and writes supplied content without verifying that the resolved path remains inside that directory. An unauthenticated POST can overwrite service files, including Linux cron jobs or systemd units, and execute code with the pyLoad service account's privileges.

The record

CVE
CVE-2025-54802
Published
Aug 5, 2025
Updated
Aug 5, 2025
Vendor
pyLoad
Product
pyLoad
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.5.0b3.dev89, < 0.5.0b3.dev90

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pyLoad · pyLoadversion=>= 0.5.0b3.dev89, < 0.5.0b3.dev90

Published CVSS scores

9.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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