{"id":"CVE-2026-18436","state":"PUBLISHED","title":"MailerPress <= 1.5.0 - Missing Authorization to Unauthenticated Arbitrary Modification via REST API Endpoint","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.","publishedAt":"2026-07-31T08:30:15.838Z","updatedAt":"2026-07-31T10:53:34.281Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","source":"Wordfence"},"assigner":"Wordfence","products":["mailerpress MailerPress – Newsletter, email marketing & AI automation"],"affected":[{"vendor":"mailerpress","product":"MailerPress – Newsletter, email marketing & AI automation","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.5.0","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/793a7ef0-8938-47a6-80ed-83f69fbbb27f?source=cve","https://plugins.trac.wordpress.org/browser/mailerpress/trunk/src/Api/CampaignRevisions.php#L156","https://plugins.trac.wordpress.org/browser/mailerpress/trunk/src/Api/CampaignRevisions.php#L155"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/18xxx/CVE-2026-18436.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-18436","state":"PUBLISHED","datePublished":"2026-07-31T08:30:15.838Z","dateUpdated":"2026-07-31T10:53:34.281Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-07-30T20:11:46.469Z"},"containers":{"cna":{"title":"MailerPress <= 1.5.0 - Missing Authorization to Unauthenticated Arbitrary Modification via REST API Endpoint","descriptions":[{"lang":"en","value":"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":[{"vendor":"mailerpress","product":"MailerPress – Newsletter, email marketing & AI automation","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.5.0","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/793a7ef0-8938-47a6-80ed-83f69fbbb27f?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/mailerpress/trunk/src/Api/CampaignRevisions.php#L156"},{"url":"https://plugins.trac.wordpress.org/browser/mailerpress/trunk/src/Api/CampaignRevisions.php#L155"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862 Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-07-31T08:30:15.838Z"},"credits":[{"lang":"en","type":"finder","value":"Jakub Lipiński (A3RES)"}],"timeline":[{"time":"2026-07-30T20:26:53.000Z","lang":"en","value":"Vendor Notified"},{"time":"2026-07-30T00:00:00.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-31T10:47:30.154298Z","id":"CVE-2026-18436","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-31T10:53:34.281Z"}}]}}}