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CVE-2026-104246— Contact Form 7 Signature Addon <= 4.2.2 - Unauthenticated Arbitrary File Read via Path Traversal in Email Attachments

Quick assessment

Affected
Unknown Contact Form 7 Signature Addon
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.

Contact Form 7 Signature Addon WordPress 插件（版本 4.2.2 及更早版本）在构建电子邮件附件路径前，未对签名字段值进行清理（sanitization），导致未认证攻击者可通过路径遍历（path traversal）将任意文件（当前受限于 wp-content 目录）附加到表单发出的电子邮件中；若表单配置为向由提交者控制的地址发送副本，攻击者即可读取目标文件。

AI Predicted 8.2 Difficulty: Easy EPSS 0.16% · P5
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I. Basic Information for CVE-2026-104246

Vulnerability Information
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Vulnerability Title
Contact Form 7 Signature Addon <= 4.2.2 - Unauthenticated Arbitrary File Read via Path Traversal in Email Attachments
Source: CVE Program / CVE List V5
Vulnerability Description
The Contact Form 7 Signature Addon WordPress plugin through 4.2.2 does not sanitize a signature field value before building an email attachment path from it, allowing unauthenticated users to attach arbitrary files (bounded to wp-content on current Contact Form 7) to a form's outgoing email via path traversal; when a form is configured to email a copy to a submitter-controlled address, the attacker can read the targeted file.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Contact Form 7 Signature Addon 0 ~ 4.2.2 -

II. Public POCs for CVE-2026-104246

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III. Intelligence Information for CVE-2026-104246

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Same Patch Batch · Unknown · 2026-10-17 · 12 CVEs total

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CVE-2026-81344 Frontend Admin by DynamiApps <= 3.29.13 - Admin+ PHP Object Injection
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CVE-2026-103376 PeachPay 1.117.9 - 1.120.69 - Unauthenticated Order Key Disclosure via ConvesioPay BTCPay
CVE-2026-92433 Patreon WordPress < 1.10.0 - Patreon Integration Takeover via CSRF
CVE-2026-92432 Patreon WordPress < 1.10.0 - Open Redirect via 'state' Parameter
CVE-2026-92431 Patreon WordPress < 1.10.0 - Unauthenticated Taxonomy and Term Enumeration
CVE-2026-104122 Ukr-To-Lat <= 1.3.5 - Contributor+ SQLi via Term Name
CVE-2026-91074 BSK PDF Manager <= 3.8.1 - Contributor+ SQLi via tags_specific Shortcode Attribute

IV. Related Vulnerabilities

Same vendor: Unknown

V. Comments for CVE-2026-104246

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