What’s Vulnerable › Vulnerabilities

CVE-2025-9762: Post By Email <= 1.0.4b - Unauthenticated Arbitrary File Upload via Email Attachments

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-30 · updated 2026-06-17
• Weakness: CWE-78

Description

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.

Affected products

• westi Post By Email: through 1.0.4b

References

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

Get alerted when CVE-2025-9762 or the next vulnerability affects your stack