CVE-2026-92537— Newsletter 9.3.9 凭据保护不足漏洞
一分钟漏洞结论
影响对象
satollo Newsletter – Send awesome emails from WordPress
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。
The Newsletter – Send awesome emails from WordPress 插件（WordPress 版本）在所有 9.3.9 及更早的版本中均存在“凭证保护不足”漏洞。 该插件公开的点击跟踪 REST 路由 注册时使用了 。当接收到有效的 keyed-MD5 签名时，该路由会调用 函数。由于通过 加载的订阅者对象缺少 属性，导致 函数返回原始 token 列的值，而非其 MD5 掩码变体。因此，该函数会向请求方发出 响应头。 这使得未认证的攻击者只要获取到目标订阅者的任意一个已签名的点
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一、 漏洞 CVE-2026-92537 基础信息
漏洞信息
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Vulnerability Title
Newsletter <= 9.3.9 - Unauthenticated Insufficiently Protected Credentials via '/tnp/l/' Click-Tracking REST Endpoint (Raw Subscriber Token Cookie Disclosure)
来源: CVE Program / CVE List V5
Vulnerability Description
The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Insufficiently Protected Credentials in all versions up to, and including, 9.3.9 The plugin's public click-tracking REST route `/tnp/l/` is registered with `permission_callback => '__return_true'` and, upon receiving a valid keyed-MD5 signature, calls `set_user_cookie()`, which emits a `Set-Cookie: newsletter=<id>-<raw_token>` response header to the requester because the subscriber object loaded via `get_user()` lacks the `_trusted` property, causing `get_user_key()` to return the raw token column value instead of its MD5-masked variant. This makes it possible for unauthenticated attackers who obtain any signed click-tracking URL for a target subscriber to receive that subscriber's permanent raw authentication cookie, which they can then use to export the subscriber's full PII record via the JSON profile-export endpoint (`?na=px`), rewrite the subscriber's stored profile (`?na=ps`), and silently unsubscribe the subscriber via the RFC-8058 one-click endpoint (`?na=ocu`), none of which require a nonce, password, or email challenge. Signed tracking URLs are embedded in every external link of every newsletter delivered to a subscriber, carry no timestamp, and never expire until the site's relink key rotates, meaning that any party who observes such a URL — through a forwarded email, a shared inbox, a mail-gateway log, or Referer headers on the redirect target, which has no Referrer-Policy set — can replay it indefinitely to obtain the victim's credential.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| satollo | Newsletter – Send awesome emails from WordPress | 0 ~ 9.3.9 | - |
|
二、漏洞 CVE-2026-92537 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-92537 其他参考 (8)
IV. Related Vulnerabilities
Same product: Newsletter – Send awesome emails from WordPress
Same vendor: satollo
V. Comments for CVE-2026-92537
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