CVE-2026-92553YaySMTP <= 2.7.7 - Authenticated (Subscriber+) Arbitrary File Upload via Attachment Filename Extension
Updated under an hour ago ()
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It affects yaycommerce YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.57%, higher than 46% of scored CVEs.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-434
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.57% (percentile 46)
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 16, 2026
Affected products
yaycommerce YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports yaycommerce:yaysmtp_wp_mail_smtp_with_email_logs_tracking_and_reports (from the name) | through 2.7.7 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/4abbf148-4648-440c-8a82-cf68bf051fbe?source=cve
- https://plugins.trac.wordpress.org/browser/yaysmtp/tags/2.7.7/includes/Helper/EmailLogAttachments.php#L542
- https://plugins.trac.wordpress.org/browser/yaysmtp/tags/2.7.7/includes/Helper/EmailLogAttachments.php#L549
- https://plugins.trac.wordpress.org/browser/yaysmtp/tags/2.7.7/includes/Helper/EmailLogAttachments.php#L178
- https://plugins.trac.wordpress.org/browser/yaysmtp/tags/2.7.7/includes/Helper/EmailLogAttachments.php#L106
- https://plugins.trac.wordpress.org/browser/yaysmtp/tags/2.7.7/includes/Helper/Utils.php#L814
- https://plugins.trac.wordpress.org/browser/yaysmtp/tags/2.7.7/includes/PluginCore.php#L37
- https://plugins.trac.wordpress.org/changeset/3739875/yaysmtp/trunk/includes/Helper/EmailLogAttachments.php
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.