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    CVE-2023-6875

    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.

    Published:Jan 11, 2024
    Last Modified:Apr 8, 2026
    EPS:Jan 11, 2024
    EPSS Score:0.93684
    CVSS Score:9.8

    Affected Products

    Vendor
    Wpexperts
    Product
    Post Smtp

    Exploits

    https://github.com/gbrsh/CVE-2023-6875https://github.com/hatlesswizard/CVE-2023-6875https://github.com/UlyssesSaicha/CVE-2023-6875

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Related CVEs

    CVE-2026-81278 (CVSS 5.4) — Missing Authorization vulnerability in WPExperts Post SMTP allows Exploiting Incorrectly Configured Access Con…
    CVE-2026-48838 (CVSS 7.1) — Unauthenticated Cross Site Scripting (XSS) in Post SMTP <= 3.6.2 versions.…
    CVE-2025-24000 (CVSS 8.8) — Authentication Bypass Using an Alternate Path or Channel vulnerability in Saad Iqbal Post SMTP post-smtp allow…
    CVE-2024-13844 (CVSS 4.9) — The Post SMTP plugin for WordPress is vulnerable to generic SQL Injection via the ‘columns’ parameter in all v…
    CVE-2025-0521 (CVSS 7.2) — The Post SMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the from and subject param…
    CVE-2025-22800 (CVSS 4.3) — Missing Authorization vulnerability in Saad Iqbal Post SMTP post-smtp allows Exploiting Incorrectly Configured…
    CVE-2024-52436 (CVSS 7.6) — Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Saad Iqb…
    CVE-2023-52233 (CVSS 8.6) — Missing Authorization vulnerability in Post SMTP Post SMTP Mailer/Email Log.This issue affects Post SMTP Maile…
    CVE-2024-5207 (CVSS 7.2) — The POST SMTP – The #1 WordPress SMTP Plugin with Advanced Email Logging and Delivery Failure Notifications pl…
    CVE-2024-29128 (CVSS 7.1) — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Post SMT…

    References

    https://plugins.trac.wordpress.org/browser/post-smtp/trunk/Postman/Mobile/includes/rest-api/v1/rest-api.php#L60
    https://plugins.trac.wordpress.org/changeset/3016051/post-smtp/trunk?contextall=1&old=3012318&old_path=%2Fpost-smtp%2Ftrunk
    https://www.wordfence.com/threat-intel/vulnerabilities/id/e675d64c-cbb8-4f24-9b6f-2597a97b49af?source=cve
    http://packetstormsecurity.com/files/176525/WordPress-POST-SMTP-Mailer-2.8.7-Authorization-Bypass-Cross-Site-Scripting.html
    https://plugins.trac.wordpress.org/browser/post-smtp/trunk/Postman/Mobile/includes/rest-api/v1/rest-api.php#L60
    https://plugins.trac.wordpress.org/changeset/3016051/post-smtp/trunk?contextall=1&old=3012318&old_path=%2Fpost-smtp%2Ftrunk
    https://www.wordfence.com/threat-intel/vulnerabilities/id/e675d64c-cbb8-4f24-9b6f-2597a97b49af?source=cve

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High