WordPress security changelog
CRITICAL CVE-2023-6875 Modified

POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for: A security weakness

POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation.

CVE / CNA score 9.8 CVSS 3.1 · security@wordfence.com
NVD score 9.8 CVSS 3.1 · nvd@nist.gov
Component
POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for
Plugin slug
post-smtp
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Jan 11, 2024
Weakness
CWE-639 — Authorization Bypass Through User-Controlled Key
CWE-862 — Missing Authorization

This CVE was published Jan 11, 2024 and is one of 27 known issues for this plugin.

What to do

Update, patch or deactivate.

Update POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

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

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

References

Primary and upstream sources