CVE-2026-17571Network attack vectorHinoki check available

Reflected script execution via unescaped array parameter

Published Aug 1, 2026 · Updated Aug 1, 2026

Reflected XSS in WPManageNinja Fluent Forms 6.2.8 and earlier allows remote attackers to execute scripts via an array-valued parameter. Component.php's ff_get shortcode returns array-valued query input through implode without applying the esc_html call used for scalar values. A victim must open an attacker-crafted link to a page that invokes the shortcode; the injected script then runs in that site's browser context.

CVSS severity6.1
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Reflected XSS in WPManageNinja Fluent Forms 6.2.8 and earlier allows remote attackers to execute scripts via an array-valued parameter. Component.php's ff_get shortcode returns array-valued query input through implode without applying the esc_html call used for scalar values. A victim must open an attacker-crafted link to a page that invokes the shortcode; the injected script then runs in that site's browser context.

The record

CVE
CVE-2026-17571
Published
Aug 1, 2026
Updated
Aug 1, 2026
Vendor
Mahmudul Hasan Arif
Product
Fluent Forms
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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 <=6.2.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mahmudul Hasan Arif · Fluent Formsversion=0 <=6.2.8

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.

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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')
T1204.001User Execution: Malicious Link

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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