CVE-2024-39205Public exploitNetwork attack vector

Unauthenticated code execution via js2py sandbox escape

Published Oct 28, 2024 · Updated Oct 30, 2024

Code injection in pyLoad-ng 0.5.0b3.dev85 on Python 3.11 and earlier allows remote attackers to execute arbitrary shell commands. The /flash/addcrypted2 endpoint evaluates attacker-controlled jk data with js2py, whose sandbox permits access to Python subprocess execution. A forged Host header bypasses the endpoint's localhost-only restriction, so exploitation requires neither an account nor user interaction.

CVSS severity9.8
Critical
EPSS probability16.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in pyLoad-ng 0.5.0b3.dev85 on Python 3.11 and earlier allows remote attackers to execute arbitrary shell commands. The /flash/addcrypted2 endpoint evaluates attacker-controlled jk data with js2py, whose sandbox permits access to Python subprocess execution. A forged Host header bypasses the endpoint's localhost-only restriction, so exploitation requires neither an account nor user interaction.

The record

CVE
CVE-2024-39205
Published
Oct 28, 2024
Updated
Oct 30, 2024
Vendor
pyLoad Team
Product
pyLoad-ng
Classifications
CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 2024Record 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.dev85

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pyLoad Team · pyLoad-ngversion=0.5.0b3.dev85

Published CVSS scores

9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8CISA-ADPCVSS: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

Public exploit references

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Technologies

Your stack

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Your stack

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