Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-92553— YaySMTP <= 2.7.7 - Authenticated (Subscriber+) Arbitrary File Upload via Attachment Filename Extension

Quick assessment

Affected
yaycommerce YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件 YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports 在所有 2.7.7 及以下版本中，通过其 putFile 函数存在任意文件上传漏洞。该漏洞的根源在于 putFile 函数中文件类型验证不足：sanitize_file_name() 函数不会移除可执行文件扩展名，且未实施白名单机制、MIME 类型检查或安全扩展名重命名措施。因此，拥有订阅者及以上权限的已认证攻击者可以上传可能具备可执行性的文件，从而实现远程代码执行（RCE

CVSS 8.8 · High EPSS 0.57% · P46

Affected Version Matrix 1

VendorProduct Version RangeStatus
yaycommerce YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports ≤ 2.7.7 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-92553

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
YaySMTP <= 2.7.7 - Authenticated (Subscriber+) Arbitrary File Upload via Attachment Filename Extension
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
yaycommerce YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports 0 ~ 2.7.7 -

II. Public POCs for CVE-2026-92553

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-92553

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-92553 (1)

Vendor Pages for CVE-2026-92553 (4)

Other References for CVE-2026-92553 (2)

IV. Related Vulnerabilities

Same vendor: yaycommerce
Same weakness: CWE-434

V. Comments for CVE-2026-92553

No comments yet

Leave a comment