WordPress plugin

WP Private Message < 1.0.6 — Insecure Direct Object Reference

CVE-2023-0453Published Jan 30, 2023 · Updated Nov 13, 2026

Affected: <1.0.6Update to 1.0.6 or newer

All remediation steps

Watch plugin

Severity

High7.1

CVSS

7.1

CVSS 3.1 · CNA (Wordfence)

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

What does this vector mean?

AV:N Attack vector: Network
AC:L Attack complexity: Low
PR:L Privileges required: Low
UI:N User interaction: None
S:U Scope: Unchanged
C:H Confidentiality: High
I:L Integrity: Low
A:N Availability: None

Weakness

CWE-639 Authorization Bypass Through User-Controlled Key

Required access

Unknown

Exploit prediction (EPSS)

No score

CISA KEV

Not listed

On this page7

Am I affected?

WP Private Message wp-private-message

Affected< 1.0.6
Patched in1.0.6

You are affected if you run < 1.0.6. Version 1.0.6 and later are not affected by this issue.

Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WP Private Message.
No admin access? Run a passive check of your site. It reads public files only.

What to do

Update to version 1.0.6, or a newer patched version
Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
Watch WP Private Message to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Veshraj Ghimire.

The WP Private Message plugin for WordPress is vulnerable to insecure direct object reference in versions up to, and including, 1.0.6. This is due to insufficient validation on a user-controlled key identifying private messages between users. This makes it possible for authenticated attackers with subscriber-level capabilities and above to read arbitrary messages.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

Advisorywordfence.com

Timeline

Jan 30, 2023
CVE published
Severity high, CVSS 7.1
Nov 13, 2026
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.

How we use these sources