CVE•Published 2024-01-11•Modified 2026-04-08•1 article on news•6 live references•NVD data

CVE-2023-6875Wpexperts · Post_smtp

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

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

EPSS percentile

100

Exploit Prediction Scoring System · top 0% of all CVEs

Weaknesses (CWE)

CWE-639Authorization Bypass Through User-Controlled Key CWE-862Missing Authorization

Description

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to unauthorized access of data and modification of data due to a type juggling issue on the connect-app REST endpoint in all versions up to, and including, 2.8.7. This makes it possible for unauthenticated attackers to reset the API key used to authenticate to the mailer and view logs, including password reset emails, allowing site takeover. CVE-2023-52233 appears to be a duplicate of this issue.

Timeline

Published 2024-01-11

Modified 2026-04-08

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2023-6875

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · WP plugin path

http.html:"/wp-content/plugins/post-smtp/"

Matches any site loading the "post-smtp" plugin — doesn't rely on Shodan's vuln tag.

Shodan · product

product:"Wpexperts Post Smtp"

All exposed Wpexperts Post Smtp instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Post Smtp"

HTTP body or banner mentions "Post Smtp" — catches deploys Shodan didn't identify as a product.