CVE-2026-4388Network attack vector

Unauthenticated stored XSS via Matrix submissions

Published Apr 14, 2026 · Updated Apr 14, 2026

Stored XSS in 10Web Form Maker 1.15.40 and earlier allows remote attackers to run JavaScript when an administrator views a Matrix submission. The Matrix Text Box path strips tags with sanitize_text_field but preserves quotes, then renders stored submission data in the admin view without output escaping. Exploitation requires an enabled public form with that field and an administrator to open its submission details, exposing the administrator's browser context.

CVSS severity7.2
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in 10Web Form Maker 1.15.40 and earlier allows remote attackers to run JavaScript when an administrator views a Matrix submission. The Matrix Text Box path strips tags with sanitize_text_field but preserves quotes, then renders stored submission data in the admin view without output escaping. Exploitation requires an enabled public form with that field and an administrator to open its submission details, exposing the administrator's browser context.

The record

CVE
CVE-2026-4388
Published
Apr 14, 2026
Updated
Apr 14, 2026
Vendor
10Web
Product
Form Maker
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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 <=1.15.40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

10Web · Form Makerversion=0 <=1.15.40

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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