CVE-2024-50527Network attack vector

Unauthenticated web-shell upload via undisclosed handler

Published Nov 4, 2024 · Updated May 11, 2026

Unrestricted file upload in Stacks Mobile App Builder 5.2.3 and earlier allows remote attackers to place a web shell on the web server. The published advisory identifies dangerous-file upload behavior but does not disclose the affected upload handler or the missing validation operation. Exploitation requires no authentication or user interaction and grants code execution in the web server security context, enabling server data access or alteration and service interruption.

CVSS severity10.0
Critical
EPSS probability0.51%
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 Stacks Mobile App Builder 5.2.3 and earlier allows remote attackers to place a web shell on the web server. The published advisory identifies dangerous-file upload behavior but does not disclose the affected upload handler or the missing validation operation. Exploitation requires no authentication or user interaction and grants code execution in the web server security context, enabling server data access or alteration and service interruption.

The record

CVE
CVE-2024-50527
Published
Nov 4, 2024
Updated
May 11, 2026
Vendor
Stacks
Product
Stacks Mobile App Builder
Classifications
CWE-434, CAPEC-650, T1190, T1505.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 4, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <=5.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Stacks · Stacks Mobile App Builderversion=0 <=5.2.3

Published CVSS scores

10.0PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.8NIST NVDCVSS: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 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
T1505.003Server Software Component: Web Shell

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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