WordPress plugin vulnerabilities
MC4WP: Mailchimp for WordPress vulnerabilities
Known security issues in the MC4WP: Mailchimp for WordPress WordPress plugin, by affected version, with severity, CVE and the version that fixes each one.
- Plugin slug
- mailchimp-for-wp
- Latest version
- 4.14.1
- Active installs
- 1,000,000+
- Known vulnerabilities
- 20
- Data updated
- 2026-10-18 09:50 UTC
Check your version
This information comes from public vulnerability databases and may be incomplete or out of date. A plugin with no known vulnerabilities is not proof that it is secure; keep plugins updated and remove the ones you do not use.
Fixed in version 4.14.1 (1)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| MC4WP: Mailchimp for WordPress <= 4.14.0 - Reflected Cross-Site Scripting via 'data' Dynamic Content Tag CVE-2026-87917 · Source | Medium | 6.1 | < 4.14.1 | 2026-08-21 |
Fixed in version 4.12.1 (1)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| MC4WP: Mailchimp for WordPress <= 4.12.0 - Authenticated (Author+) Stored Cross-Site Scripting via Form Response Messages CVE-2026-4561 · Source | Medium | 6.4 | < 4.12.1 | 2026-03-10 |
Fixed in version 4.12.0 (1)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| MC4WP: Mailchimp for WordPress <= 4.11.1 - Missing Authorization to Unauthenticated Arbitrary Subscription Deletion CVE-2026-1781 · Source | Not rated | - | < 4.12.0 | 0000-00-00 |
Fixed in version 4.9.17 (1)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| MailChimp for Wordpress <= 4.9.16 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2024-8680 · Source | Medium | 5.5 | < 4.9.17 | 2024-09-20 |
Fixed in version 4.9.10 (1)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| WordPress MC4WP Plugin <= 4.9.9 is vulnerable to Broken Access Control CVE-2023-51682 · Source | Medium | 5.3 | < 4.9.10 | 2023-12-27 |
Fixed in version 4.8.7 (3)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| MC4WP: Mailchimp for WordPress <= 4.8.6 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2021-36833 · Source | Medium | 4.8 | < 4.8.7 | 2022-03-02 |
| MC4WP: Mailchimp for WordPress < 4.8.7 - Cross-Site Scripting No CVE assigned · Source | Not rated | - | < 4.8.7 | 2022-03-02 |
| MC4WP < 4.8.7 - Admin+ Stored Cross-Site Scripting No CVE assigned · Source | Not rated | - | < 4.8.7 | - |
Fixed in version 4.8.5 (6)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| WordPress MC4WP plugin <= 4.8.4 - Unauthorised Actions via Cross-Site Request Forgery (CSRF) vulnerability No CVE assigned · Source | Not rated | - | < 4.8.5 | 2021-06-01 |
| WordPress MC4WP plugin <= 4.8.4 - Authenticated Arbitrary Redirect vulnerability No CVE assigned · Source | Not rated | - | < 4.8.5 | 2021-06-01 |
| MC4WP: Mailchimp for WordPress <= 4.8.4 - Cross-Site Request Forgery No CVE assigned · Source | Not rated | - | < 4.8.5 | 2021-06-01 |
| MC4WP: Mailchimp for WordPress <= 4.8.4 - Open Redirect No CVE assigned · Source | Not rated | - | < 4.8.5 | 2021-06-01 |
| MC4WP: Mailchimp for WordPress < 4.8.5 - Authenticated Arbitrary Redirect No CVE assigned · Source | Not rated | - | < 4.8.5 | - |
| MC4WP: Mailchimp for WordPress < 4.8.5 - Unauthorised Actions via CSRF No CVE assigned · Source | Not rated | - | < 4.8.5 | - |
Fixed in version 4.1.8 (1)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| Mailchimp For WP <= 4.1.7 - Cross-Site Scripting CVE-2017-18577 · Source | Medium | 6.1 | < 4.1.8 | 2017-09-08 |
Fixed in version 4.1.7 (2)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| MC4WP: Mailchimp for WordPress <= 4.1.6 - Reflected Cross-Site Scripting No CVE assigned · Source | Not rated | - | < 4.1.7 | 2019-11-09 |
| MailChimp for WordPress <= 4.1.6 - Authenticated Cross-Site Scripting (XSS) No CVE assigned · Source | Not rated | - | < 4.1.7 | - |
Fixed in version 4.0.11 (2)
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| MailChimp for WordPress <= 4.0.10 - Reflected Cross-Site Scripting CVE-2016-10871 · Source | Medium | 6.1 | < 4.0.11 | 2016-12-13 |
| WordPress MailChimp Plugin <= 4.0.10 - Cross Site Scripting No CVE assigned · Source | Not rated | - | < 4.0.11 | 2016-12-09 |
Affects version 4.9.16 and earlier (1)
The source does not state the fixed version; versions after this one are not listed as affected.
| Vulnerability | Severity | CVSS | Affected versions | Published |
|---|---|---|---|---|
| MC4WP: Mailchimp for WordPress 4.9.9 - 4.9.16 - Reflected Cross-Site Scripting CVE-2024-8850 · Source | Medium | 6.1 | >= 4.9.9 and <= 4.9.16 | 2024-09-18 |
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Sources and attribution
- Vulnerability data from WPVulnerability (WordPress, plugins, themes and server software). WPVulnerability data license.
- CVE records are copyright The MITRE Corporation. CVE Terms of Use.
- Known-exploited status from the CISA Known Exploited Vulnerabilities catalog. Public domain (U.S. Government work).
- Plugin names, latest versions and install counts from the WordPress.org plugin directory. WordPress is a trademark of the WordPress Foundation; Webforta is not affiliated with or endorsed by WordPress.org, WPVulnerability or the sources above.