CVE-2026-18146Network attack vectorHinoki check available

Unauthenticated stored XSS via notification Smartcode values

Published Aug 13, 2026 · Updated Aug 13, 2026

Stored XSS in WPManageNinja Fluent Forms 6.2.11 and earlier allows remote attackers to execute scripts through notification Smartcode values. The notification path places attacker-influenced field, cookie, or response Smartcode values into configured subject or static recipient fields without sufficient sanitization, and Submission Logs render the stored output without adequate escaping. Exploitation requires a matching notification configuration and an administrator or entry-viewing manager to open the affected submission log.

CVSS severity7.2
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in WPManageNinja Fluent Forms 6.2.11 and earlier allows remote attackers to execute scripts through notification Smartcode values. The notification path places attacker-influenced field, cookie, or response Smartcode values into configured subject or static recipient fields without sufficient sanitization, and Submission Logs render the stored output without adequate escaping. Exploitation requires a matching notification configuration and an administrator or entry-viewing manager to open the affected submission log.

The record

CVE
CVE-2026-18146
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Mahmudul Hasan Arif
Product
Fluent Forms
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 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 <=6.2.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mahmudul Hasan Arif · Fluent Formsversion=0 <=6.2.11

Published CVSS scores

7.2WordfenceCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

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Technologies

Your stack

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Your stack

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