Security Advisory

CVE-2026-18436

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-31 08:30:15

Last updated 2026-07-31 10:53:34

Assigner Wordfence

CVSS score not scored

State PUBLISHED

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.

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