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CVE-2026-18436

MEDIUM 5.3 CVSS 3.1
Published
July 31, 2026
Last modified
August 12, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-862
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Description

The MailPress plugin for WordPress is vulnerable to unauthorized access in versions up to, and including, 1.5.0 via the campaign revision-restore REST endpoint (POST /wp-json/mailpress/v1/campaign/<id>/restore-revision/<revision_id>). The route in the vulnerable range was registered without a permissionCallback, allowing the restoreRevision() handler to run for unauthenticated requests and overwrite a campaign's content_html with any prior revision. This makes it possible for unauthenticated attackers to modify campaign content by restoring an arbitrary revision.

Affected WordPress components

  • MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails Plugin · mailerpress
    Confirmed match Active
    Up to and including 1.5.0
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • mailerpress MailerPress – Newsletter, email marketing & AI automation — Up to and including 1.5.0

References