CVE-2024-1659Network attack vector

Arbitrary server file write via unauthenticated upload

Published Jun 12, 2024 · Updated Aug 1, 2024

Unrestricted file upload in Jan Syski MegaBIP 5.10 and earlier allows remote attackers to write arbitrary files via network requests. CERT.PL has not disclosed the affected upload handler or the validation failure that permits PHP files and other attacker-chosen content. No authentication or user interaction is required, and a remotely uploaded PHP file can place executable content on the server.

CVSS severity9.3
Critical
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Jan Syski MegaBIP 5.10 and earlier allows remote attackers to write arbitrary files via network requests. CERT.PL has not disclosed the affected upload handler or the validation failure that permits PHP files and other attacker-chosen content. No authentication or user interaction is required, and a remotely uploaded PHP file can place executable content on the server.

The record

CVE
CVE-2024-1659
Published
Jun 12, 2024
Updated
Aug 1, 2024
Vendor
Jan Syski
Product
MegaBIP
Classifications
CWE-434, CAPEC-650, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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 <=5.09
  2. Affected versionversion=0 <=5.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jan Syski · MegaBIPversion=0 <=5.09; version=0 <=5.10

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3CERT.PLCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/AU:Y/R:I/V:D/RE:M/U:Amber

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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-650Upload a Web Shell to a Web Server
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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