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

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVE CVE-2025-9762
CVSS Critical (9.8)
Publicly Published September 29, 2025
Last Updated September 30, 2025
Researcher Jonas Benjamin Friedli
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.

References

1 affected software package

Software Type Plugin
Software Slug post-by-email (view on wordpress.org)
Patched? No
Affected Version
  • <= 1.0.4b
Patched Version
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