CVE-2026-18436 MailerPress <= 1.5.0 - Missing Authorization to Unauthenticated Arbitrary Modification via REST API Endpoint
MediumCVSS 5.3
EPSS 0.39%
- Published
- Updated
- Exploit status
- No public exploit known
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 products
| Product | Affected versions | Fixed in |
|---|---|---|
| MailerPress – Newsletter, email marketing & AI automation | <= 1.5.0 | No fix listed |
| wordpress mailerpress(WordPress) | < 1.5.1 | 1.5.1 |
References
- www.wordfence.com
- plugins.trac.wordpress.org
- Wordfence Intelligence third-party-advisory
- www.cve.org