Arbitrary file upload in Yaycommerce Yaysmtp – Wp Mail Smtp With Email Logs, Tracking & Reports

CVE-2026-92553

The YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.7.7 via the putFile function. This is due to insufficient file type validation in the putFile function, as sanitize_file_name() does not strip executable extensions and no allow-list, MIME check, or safe-extension rename is applied. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. The only server-side guard is a .htaccess file containing 'Require all denied' written by writeGuards(), which is silently ignored by nginx and by Apache configured with AllowOverride None, meaning RCE is fully achievable on those server configurations.

Vulnerability class: Unrestricted File Upload

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-92553?
CVE-2026-92553 is a high-severity vulnerability in Yaycommerce Yaysmtp – Wp Mail Smtp With Email Logs, Tracking & Reports, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-10-16.
How severe is CVE-2026-92553?
High severity. CVSS v3 base score is 8.8 out of 10.