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CVE-2026-107759— WPO365 | MICROSOFT 365 GRAPH MAILER <= 6.2 - Unauthenticated Stored Cross-Site Scripting via Email Subject via wp_mail

Quick assessment

Affected
wpo365 WPO365 | MICROSOFT 365 GRAPH MAILER
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"WPO365 攻击载荷可在无需身份验证的情况下被存储：只要启用了 Graph Mailer 功能但尚未完成 OAuth 授权（这是插件激活后的默认状态），任何邮件发送功能若会转发由提交者控制的邮件主题（例如 Contact Form 7 表单提交的主题），均可被利用来注入恶意脚本。

CVSS 7.2 · High EPSS 0.27% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpo365 WPO365 | MICROSOFT 365 GRAPH MAILER ≤ 6.2 affected
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I. Basic Information for CVE-2026-107759

Vulnerability Information
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Vulnerability Title
WPO365 | MICROSOFT 365 GRAPH MAILER <= 6.2 - Unauthenticated Stored Cross-Site Scripting via Email Subject via wp_mail
Source: CVE Program / CVE List V5
Vulnerability Description
The WPO365 | MICROSOFT 365 GRAPH MAILER plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Subject (via wp_mail/PHPMailer, e.g. CF7 your-subject)' parameter in all versions up to, and including, 6.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is stored without authentication via any mail-sending feature that forwards a submitter-controlled subject (e.g. a Contact Form 7 form) when the Graph Mailer is enabled but OAuth authorization has not been completed, a default state immediately after plugin activation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
wpo365 WPO365 | MICROSOFT 365 GRAPH MAILER 0 ~ 6.2 -

II. Public POCs for CVE-2026-107759

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III. Intelligence Information for CVE-2026-107759

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Other References for CVE-2026-107759 (7)

IV. Related Vulnerabilities

Same product: WPO365 | MICROSOFT 365 GRAPH MAILER
Same vendor: wpo365
Same weakness: CWE-79