CVE-2023-0453Public exploitNetwork attack vector

Private message disclosure via unchecked message ID

Published Feb 21, 2023 · Updated Mar 12, 2025

IDOR in WP Private Message before 1.0.6 allows remote authenticated users to read other users' private messages via a modified message ID. The wp_private_message_choose_message AJAX action accepts a user-controlled message_id and returns message data without checking ownership. Any authenticated account with a valid nonce can retrieve a private message belonging to another user, while no write or service-interruption impact is reported.

CVSS severity4.3
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in WP Private Message before 1.0.6 allows remote authenticated users to read other users' private messages via a modified message ID. The wp_private_message_choose_message AJAX action accepts a user-controlled message_id and returns message data without checking ownership. Any authenticated account with a valid nonce can retrieve a private message belonging to another user, while no write or service-interruption impact is reported.

The record

CVE
CVE-2023-0453
Published
Feb 21, 2023
Updated
Mar 12, 2025
Vendor
ApusTheme
Product
WP Private Message
Classifications
CWE-639, T1213.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ApusTheme · WP Private Messageversion=0 <1.0.6

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1213.005Data from Information Repositories: Messaging Applications

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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