CVE-2026-92553 json
YaySMTP <= 2.7.7 - Authenticated (Subscriber+) Arbitrary File Upload via Attachment Filename Extension
published 2026-10-16 24 d ago modified 2026-10-16 23 d ago also EUVD-2026-102789
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 23 d ago
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- yaycommerce YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/4abbf148-4648-440c-8a82-cf68bf051fbe?source=cve
- plugins.trac.wordpress.org /browser/yaysmtp/tags/2.7.7/includes/Helper/EmailLogAttachments.php#L542
- plugins.trac.wordpress.org /browser/yaysmtp/tags/2.7.7/includes/Helper/EmailLogAttachments.php#L549
- plugins.trac.wordpress.org /browser/yaysmtp/tags/2.7.7/includes/Helper/EmailLogAttachments.php#L178
- plugins.trac.wordpress.org /browser/yaysmtp/tags/2.7.7/includes/Helper/EmailLogAttachments.php#L106
- plugins.trac.wordpress.org /browser/yaysmtp/tags/2.7.7/includes/Helper/Utils.php#L814
- plugins.trac.wordpress.org /browser/yaysmtp/tags/2.7.7/includes/PluginCore.php#L37
- plugins.trac.wordpress.org /changeset/3739875/yaysmtp/trunk/includes/Helper/EmailLogAttachments.php
Sources
- CVE List CVE-2026-92553
- NVD CVE-2026-92553
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.