CVE-2026-18436 (GCVE-0-2026-18436)
Vulnerability from cvelistv5 – Published: 2026-07-31 08:30 – Updated: 2026-07-31 10:53
VLAI
EPSS
VEX
Title
MailerPress <= 1.5.0 - Missing Authorization to Unauthenticated Arbitrary Modification via REST API Endpoint
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 10:47 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
Wordfence
CNA
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mailerpress | MailerPress – Newsletter, email marketing & AI automation |
Affected:
0 , ≤ 1.5.0
(semver)
|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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