CVE-2024-10646Known exploitationNetwork attack vector

Unauthenticated stored XSS via unsanitized form subject

Published Dec 14, 2024 · Updated Apr 8, 2026

Stored cross-site scripting in Fluent Forms 5.2.6 and earlier allows remote attackers to inject scripts through a form subject. The submission sanitizer in boot/globals.php accepts the subject parameter without sufficient neutralization, and later rendering outputs the stored value without context-appropriate escaping. No authentication is required to submit the payload; execution occurs when a user opens a page that renders the poisoned subject, exposing that browser session to script actions.

CVSS severity7.2
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Fluent Forms 5.2.6 and earlier allows remote attackers to inject scripts through a form subject. The submission sanitizer in boot/globals.php accepts the subject parameter without sufficient neutralization, and later rendering outputs the stored value without context-appropriate escaping. No authentication is required to submit the payload; execution occurs when a user opens a page that renders the poisoned subject, exposing that browser session to script actions.

The record

CVE
CVE-2024-10646
Published
Dec 14, 2024
Updated
Apr 8, 2026
Vendor
Mahmudul Hasan Arif
Product
Fluent Forms
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 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 <=5.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mahmudul Hasan Arif · Fluent Formsversion=0 <=5.2.6

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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 exploitationReported
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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Reported exploitation

Technologies

Your stack

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Your stack

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