How to fix CVE-2025-48143?

Within 24 hours: Identify all instances of SalesUp contact form plugin across web properties and document affected systems. Within 7 days: Implement WAF rules to block suspicious input patterns in contact form parameters and disable the plugin if non-critical, or restrict form access to trusted networks only. Within 30 days: Monitor vendor communications for patch availability; conduct security assessment of contact form submissions for evidence of exploitation; develop incident response plan for potential compromised sessions.

CVE-2025-48143

EUVD-2025-17534 HIGH

Cross-site Scripting (XSS) (CWE-79)

2025-06-09 [email protected]

XSS

7.1

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

EUVD ID Assigned

Mar 14, 2026 - 19:21 euvd

EUVD-2025-17534

Analysis Generated

Mar 14, 2026 - 19:21 vuln.today

CVE Published

Jun 09, 2025 - 16:15 nvd

HIGH 7.1

DescriptionNVD

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in salesup2019 Formulario de contacto SalesUp! allows Reflected XSS. This issue affects Formulario de contacto SalesUp!: from n/a through 1.0.14.

AnalysisAI

Reflected Cross-Site Scripting (XSS) vulnerability in the SalesUp! Contact Form plugin (versions up to 1.0.14) that allows unauthenticated attackers to inject malicious scripts into web pages viewed by other users. The vulnerability requires user interaction (clicking a malicious link) but can compromise confidentiality, integrity, and availability across security boundaries (CVSS 7.1). There is no indication of active exploitation in the wild or confirmed proof-of-concept at this time based on available intelligence.

Technical ContextAI

This vulnerability stems from improper input neutralization during web page generation (CWE-79: Improper Neutralization of Input During Web Page Generation). The SalesUp! Contact Form plugin (affected versions: n/a through 1.0.14) fails to properly sanitize or encode user-supplied input before rendering it in HTML responses. The plugin, likely a WordPress plugin based on naming conventions, processes contact form submissions or URL parameters without adequate output encoding, enabling attackers to inject arbitrary JavaScript. The reflected nature means the malicious payload is embedded in a URL and executed in the victim's browser session when clicked, potentially stealing session tokens, performing actions on behalf of the user, or redirecting to phishing pages.

CVE-2025-48143 vulnerability details – vuln.today

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