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CVE-2026-90981— Newsletter <= 9.3.8 - Reflected Cross-Site Scripting via 'nn' Parameter

Quick assessment

Affected
satollo Newsletter – Send awesome emails from WordPress
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“The Newsletter – Send awesome emails from WordPress”在所有 9.3.8 及更早版本中，由于输入净化不足且未对输出进行转义，存在反射型跨站脚本攻击（Reflected Cross-Site Scripting）漏洞。该漏洞通过 URL 中的 'nn' 参数被触发。未认证的攻击者若能诱导用户点击一个包含恶意脚本的链接，即可在页面中注入任意 Web 脚本，脚本在页面执行。成功利用此漏洞要求受害者为已登录的管理员，因为反爬虫（antibot）检查

CVSS 6.1 · Medium EPSS 0.38% · P30

Affected Version Matrix 1

VendorProduct Version RangeStatus
satollo Newsletter – Send awesome emails from WordPress ≤ 9.3.8 affected
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I. Basic Information for CVE-2026-90981

Vulnerability Information
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Vulnerability Title
Newsletter <= 9.3.8 - Reflected Cross-Site Scripting via 'nn' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'nn' parameter in all versions up to, and including, 9.3.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Successful exploitation requires the victim to be a logged-in administrator, as the antibot check auto-passes for authenticated users, routing the unsanitized payload through the administrator-visible output branch of dienow().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
satollo Newsletter – Send awesome emails from WordPress 0 ~ 9.3.8 -

II. Public POCs for CVE-2026-90981

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III. Intelligence Information for CVE-2026-90981

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Other References for CVE-2026-90981 (3)

IV. Related Vulnerabilities

Same product: Newsletter – Send awesome emails from WordPress
Same vendor: satollo
Same weakness: CWE-79

V. Comments for CVE-2026-90981

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