CVE-2024-9417Network attack vector

Stored cross-site scripting via upload allowlist bypass

Published Oct 5, 2024 · Updated Apr 8, 2026

Unrestricted file upload in Hash Form 1.1.9 and earlier allows remote attackers to store disallowed files through public forms. The handleUpload function accepts extensions absent from both its allowedExtensions and unallowed_extensions arrays instead of rejecting unknown types. No account is required, but cross-site scripting requires a user to open the stored file.

CVSS severity6.1
Medium
EPSS probability0.37%
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 Hash Form 1.1.9 and earlier allows remote attackers to store disallowed files through public forms. The handleUpload function accepts extensions absent from both its allowedExtensions and unallowed_extensions arrays instead of rejecting unknown types. No account is required, but cross-site scripting requires a user to open the stored file.

The record

CVE
CVE-2024-9417
Published
Oct 5, 2024
Updated
Apr 8, 2026
Vendor
HashThemes
Product
Hash Form – Drag & Drop Form Builder
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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 <=1.1.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HashThemes · Hash Form – Drag & Drop Form Builderversion=0 <=1.1.9

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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
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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