Is Block for Mailchimp safe to use?

Laskyr does not give safety verdicts. No known unpatched vulnerabilities in the latest version (1.1.17). As of 2026-11-04. 2 issues are on record for older versions; version 1.1.16 or newer fixes all of them that state a fix. Keep Block for Mailchimp on the latest version (1.1.17) and remove it if you do not use it.

Which versions of Block for Mailchimp are vulnerable?

Known issues on record (newest first): Missing authorization check (1.1.15 and older, fixed in 1.1.16); Server-side request forgery (SSRF) (1.1.12 and older, fixed in 1.1.13). The full list with sources is on this page.

What is the latest version of Block for Mailchimp?

1.1.17, according to wordpress.org (last updated 2026-10-30). It has 2,000+ active installs.

What should I do if my Block for Mailchimp is out of date?

Take a backup, then update it from Dashboard > Updates (or run wp plugin update block-for-mailchimp). If you cannot update right away, deactivate it until you can. If you think the site was already attacked, run a free scan at https://laskyr.com/scan.

Plugins · block-for-mailchimp · data as of 2026-11-04

Is Block for Mailchimp safe? Known vulnerabilities and latest version

Latest version: 1.1.17
Last updated: 2026-10-30
Active installs: 2,000+
Known issues on record: 2
Unpatched in latest: 0
Tested up to WP: 7.1.4 · PHP 7.2+

Add Mailchimp email subscription forms to WordPress with a Gutenberg block – inline, popup, or floating layouts. Grow your newsletter list fast. — by bPlugins

What to do

Update to the latest version (1.1.17). Anything older than 1.1.16 has at least one known issue listed below. Dashboard → Updates, or Plugins → “update now”.
If you cannot update right away, deactivate it until you can.
Turn on auto-updates for it: Plugins → “Enable auto-updates” on its row.
If you ran a vulnerable version and something looks off (spam pages, strange admins, redirects), run the free scan.

With WP-CLI: wp plugin get block-for-mailchimp --field=version shows what you run; wp plugin update block-for-mailchimp updates it.

Check your version

Known vulnerabilities

2 on record, newest first. “Affected” is the version range the source gives; “fixed in” is the version the source names, or (marked *) the first wordpress.org release after the last affected version.

high 8.3 CVE-2026-56063 · published 2026-06-26

Missing authorization check in Block for Mailchimp (1.1.15 and older)

Affected: 1.1.15 and older
Fixed in: 1.1.16
Access needed (per CVSS): No login needed
Range from: CVE record (the advisory publisher) · score by Patchstack

Details from the advisory

Unauthenticated Broken Access Control in MailChimp Block <= 1.1.15 versions.

NVD CVE-2026-56063 Patchstack advisory

medium 4.0 CVE-2025-10735 · published 2025-10-01

Server-side request forgery (SSRF) in Block for Mailchimp (1.1.12 and older)

Affected: 1.1.12 and older
Fixed in: 1.1.13 *
Access needed (per CVSS): No login needed
Range from: CVE record (the advisory publisher) · score by Wordfence

Details from the advisory

The Block For Mailchimp – Easy Mailchimp Form Integration plugin for WordPress is vulnerable to Blind Server-Side Request Forgery in all versions up to, and including, 1.1.12 via the mcbSubmit_Form_Data(). This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

NVD CVE-2025-10735 Wordfence advisory Code change (fix)wordpress.org plugins.svn.wordpress.org

Recent activity

2026-10-30 — latest release on wordpress.org (1.1.17).
2026-06-26 — Missing authorization check disclosed (CVE-2026-56063), fixed in 1.1.16.
2025-10-01 — Server-side request forgery (SSRF) disclosed (CVE-2025-10735), fixed in 1.1.13.

Free. We check the CVE feeds every day and email you only when a new issue for Block for Mailchimp (block-for-mailchimp) is published or a fix ships. Unsubscribe in one click.

Browse vulnerabilities

Types found in this plugin: Missing authorization (1) · Server-side request forgery (SSRF) (1)

Where this data comes from

Version, last update, installs: wordpress.org/plugins/block-for-mailchimp (Plugins API), fetched 2026-11-04.
Vulnerabilities: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
Each record links to its CVE page and to the original advisory (Wordfence, Patchstack or WPScan) where there is one. We only list a CVE here when its references or its advisory name this exact plugin, so a few real issues may be missing; none should be about a different plugin. Spot an error? Email Daniel.

Badge for your site or docs (states facts with a date, not a verdict):

<a href="https://laskyr.com/plugins/block-for-mailchimp"><img src="https://laskyr.com/plugins/block-for-mailchimp/badge.svg" alt="Block for Mailchimp vulnerability status"></a>

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