CVE-2026-92553— YaySMTP 2.7.7 认证任意文件上传漏洞
一分钟漏洞结论
影响对象
yaycommerce YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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
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一、 漏洞 CVE-2026-92553 基础信息
漏洞信息
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Vulnerability Title
YaySMTP <= 2.7.7 - Authenticated (Subscriber+) Arbitrary File Upload via Attachment Filename Extension
来源: 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.
来源: 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
来源: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| yaycommerce | YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports | 0 ~ 2.7.7 | - |
|
二、漏洞 CVE-2026-92553 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-92553 补丁与修复 (1)
CVE-2026-92553 厂商页面 (4)
CVE-2026-92553 其他参考 (2)
IV. Related Vulnerabilities
Same vendor: yaycommerce
V. Comments for CVE-2026-92553
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