WordPress MC4WP: Mailchimp for WordPress plugin <= 4.14.0 - Reflected Cross-Site Scripting vulnerability

Reflected Cross-Site Scripting vulnerability discovered by nism0 in WordPress Plugin MC4WP versions = 4.14.0...

CVE-2026-87917

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'data' Dynamic Content Tag in all versions up to, and including, 4.14.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to...

EUVD-2026-83559

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'data' Dynamic Content Tag in all versions up to, and including, 4.14.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to...

CVE-2026-87917

The MC4WP: Mailchimp for WordPress plugin (versions up to and including 4.14.0 ) is vulnerable to Reflected Cross-Site Scripting (XSS) via the 'data' Dynamic Content Tag , caused by insufficient input sanitization and output escaping. An unauthenticated attacker can inject arbitrary web scripts i...

PT-2026-95794

Name of the Vulnerable Software and Affected Versions MC4WP: Mailchimp for WordPress versions prior to 4.14.1 Description Insufficient input sanitization and output escaping in the data Dynamic Content Tag allow unauthenticated attackers to perform Reflected Cross-Site Scripting. This occurs when...

CVE-2026-87917: Improper Neutralization of Input During Web Page Generation

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'data' Dynamic Content Tag in all versions up to, and including, 4.14.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to...

WordPress MC4WP: Mailchimp for WordPress plugin <= 4.12.0 - Authenticated (Author+) Stored Cross-Site Scripting via Form Response Messages vulnerability

Authenticated Author+ Stored Cross-Site Scripting via Form Response Messages vulnerability discovered by Osvaldo Noe Gonzalez Del Rio Os - krei.dev | ogbuilders.io in WordPress Plugin MC4WP versions = 4.12.0...

EUVD-2026-64299

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the form response message post meta fields e.g., 'textsubscribed', 'texterror' in all versions up to, and including, 4.12.0 due to insufficient input sanitization and output escaping. This mak...

CVE-2026-4561 MC4WP: Mailchimp for WordPress <= 4.12.0 - Authenticated (Author+) Stored Cross-Site Scripting via Form Response Messages

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the form response message post meta fields e.g., 'textsubscribed', 'texterror' in all versions up to, and including, 4.12.0 due to insufficient input sanitization and output escaping. This mak...

CVE-2026-4561: Improper Neutralization of Input During Web Page Generation

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the form response message post meta fields e.g., 'textsubscribed', 'texterror' in all versions up to, and including, 4.12.0 due to insufficient input sanitization and output escaping. This mak...

PT-2026-79552

Name of the Vulnerable Software and Affected Versions MC4WP: Mailchimp for WordPress versions prior to 4.12.1 Description Insufficient input sanitization and output escaping allow authenticated attackers with Author-level access and above to perform Stored Cross-Site Scripting. This is achieved b...

CVE-2026-1781

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 4.11.1. This is due to the plugin trusting the mc4wpaction POST parameter without validation, allowing unauthenticated attackers to force the form to process...

CVE-2026-1781: Missing Authorization

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 4.11.1. This is due to the plugin trusting the mc4wpaction POST parameter without validation, allowing unauthenticated attackers to force the form to process...

EUVD-2021-23409

Malware in sbrugna...

EUVD-2023-56382

Malicious code in bioql PyPI...

CVE-2023-51682

Missing Authorization vulnerability in ibericode MC4WP.This issue affects MC4WP: from n/a through 4.9.9...

PT-2024-39492 · WordPress · Mc4Wp: Mailchimp Top Bar

Name of the Vulnerable Software and Affected Versions: MC4WP: Mailchimp Top Bar plugin for WordPress versions up to, and including, 1.6.0 Description: The issue is related to Reflected Cross-Site Scripting due to the use of add query arg without appropriate escaping on the URL. This allows...

CVE-2024-9210: Improper Neutralization of Input During Web Page Generation

The MC4WP: Mailchimp Top Bar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of addqueryarg without appropriate escaping on the URL in all versions up to, and including, 1.6.0. This makes it possible for unauthenticated attackers to inject arbitrary web scripts...

WordPress MC4WP Plugin <= 4.9.16 is vulnerable to Cross Site Scripting (XSS)

Software MC4WP Type Plugin Vulnerable versions = 4.9.16 Fixed in 4.9.17 OWASP Top 10 A7: Cross-Site Scripting XSS Classification Cross Site Scripting XSS CVE CVE-2024-8680 Patch priority Low CVSS severity Low 5.9 Developer Claim ownership PSID 9afe0c8406de Credits Jorge Diaz ddiax Required...

CVE-2024-8680

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 4.9.16 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with...