CVE-2023-49052Public exploitNetwork attack vector

Script execution via unrestricted form file upload

Published Nov 30, 2023 · Updated Aug 2, 2024

Unrestricted file upload in Microweber 2.0.4 allows remote attackers to execute scripts through the created forms component. The form upload handler accepts an HTML file containing script content despite image-only or custom-extension validation and saves it beneath a web-accessible contact-form path. A form must expose the File Upload field, and a victim must open the stored file; the script then runs in that visitor's browser context and can read session data or redirect the page.

CVSS severity8.8
High
EPSS probability2.43%
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 Microweber 2.0.4 allows remote attackers to execute scripts through the created forms component. The form upload handler accepts an HTML file containing script content despite image-only or custom-extension validation and saves it beneath a web-accessible contact-form path. A form must expose the File Upload field, and a victim must open the stored file; the script then runs in that visitor's browser context and can read session data or redirect the page.

The record

CVE
CVE-2023-49052
Published
Nov 30, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1059.007JavaScript/JScript

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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