CVE-2023-3134Public exploitNetwork attack vector

Reflected XSS via unescaped pre-population parameters

Published Jul 31, 2023 · Updated Aug 2, 2024

Reflected XSS in WPMU DEV Forminator before 1.24.4 allows remote attackers to execute scripts via pre-populated form parameters. A configured query parameter is copied into a form field without adequate output escaping, allowing crafted markup to escape the textarea context. The form must enable pre-population, and a victim must open the crafted URL and interact with the field, exposing browser data and actions.

CVSS severity6.1
Medium
EPSS probability4.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Reflected XSS in WPMU DEV Forminator before 1.24.4 allows remote attackers to execute scripts via pre-populated form parameters. A configured query parameter is copied into a form field without adequate output escaping, allowing crafted markup to escape the textarea context. The form must enable pre-population, and a victim must open the crafted URL and interact with the field, exposing browser data and actions.

The record

CVE
CVE-2023-3134
Published
Jul 31, 2023
Updated
Aug 2, 2024
Vendor
WPMU DEV
Product
Forminator
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.24.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WPMU DEV · Forminatorversion=0 <1.24.4

Published CVSS scores

6.1NIST NVDCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo