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THREAT OPS › Threat News › [NVD] CVE-2026-4561 (MEDIUM 6.4) — 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., 'text_subscribed', 'text_error') in all versions up to, and including, 4.12.0 due to insufficient input sanitization and outp

[NVD] CVE-2026-4561 (MEDIUM 6.4) — 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., 'text_subscribed', 'text_error') in all versions up to, and including, 4.12.0 due to insufficient input sanitization and outp

mednvdPublished 2026-08-22

CVE-2026-4561 CVSS: 6.4 MEDIUM Published: 2026-08-22T14:16:33.080

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., 'text_subscribed', 'text_error') in all versions up to, and including, 4.12.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated

Indicators of compromise

CVE-2026-4561cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-4561