WordPress security changelog
MEDIUM CVE-2023-6629 Modified

POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for: Cross-site scripting

POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for is affected by cross-site scripting. The vulnerable path is reachable without authentication. Injected script can execute in the affected site's origin when the vulnerable output is viewed.

CVE / CNA score 6.1 CVSS 3.1 · security@wordfence.com
NVD score 6.1 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 03, 2024
Weakness
CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Jan 03, 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 Reflected Cross-Site Scripting via the ‘msg’ parameter in all versions up to, and including, 2.8.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. CVE-2023-6621 appears to be a duplicate of this issue. CVE-2024-29128 appears to be a duplicate of this issue.

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

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

References

Primary and upstream sources