CVE-2025-9762

CRITICAL 9.8

Post By Email <= 1.0.4b - Unauthenticated Arbitrary File Upload via Email Attachments

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

The Post By Email plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the save_attachments function in all versions up to, and including, 1.0.4b. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

CWE	CWE-78
Vendor	westi
Product	post by email
Published	Sep 30, 2025
Last Updated	Apr 8, 2026

Stay Ahead of the Next One

Get instant alerts for westi post by email

Be the first to know when new critical vulnerabilities affecting westi post by email are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

westi / Post By Email

0 ≤ 1.0.4b

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/885eb923-8e69-416b-8494-a42a9465cfe0?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/post-by-email/tags/1.0.4b/class-post-by-email.php#L702

Credits

Jonas Benjamin Friedli