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WordPress plugin

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

CVE-2025-9762Published · Updated

Action summary

Affected: ≤1.0.4bNo patch available

What to do until a fix ships
Watch plugin
Severity
Critical9.8
CVSS
9.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-78 Improper Neutralization of Special Elements used in an OS Command
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Post By Email post-by-email

  1. Affected≤ 1.0.4b
  2. PatchedNo fix yet

No patched version available.

You are affected if you run ≤ 1.0.4b. No fixed version has been released.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Post By Email.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Post By Email to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Jonas Benjamin Friedli.

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.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Post By Email

All 2
More vulnerabilities in Post By Email
SeverityVulnerabilityCVEPublished
Medium6.1Reflected Cross-Site Scripting
≤1.0.4bNo patch available
CVE-2024-52463

Timeline

  1. CVE published

    Severity critical, CVSS 9.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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