CVE-2026-120329— Broken Access Control in extension "Mail" (mail)

Quick assessment

Affected

TYPO3 Extension "Mail"

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.

保存邮件后端模块的配置时，会将提交的设置写入页面的 TSconfig，但未将其限制为该模块的配置选项范围内。拥有邮件模块访问权限的后端用户可以写入任意的页面 TSconfig 内容。

CVSS 5.3 · Medium Updated Nov 03, 2026

Possible ATT&CK Techniques 2 AI

T1548.001 · Setuid and Setgid T1552.005 · Cloud Instance Metadata API

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Vulnerability Information

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Vulnerability Title

Broken Access Control in extension "Mail" (mail)

Source: CVE Program / CVE List V5

Vulnerability Description

Saving the configuration of the mail backend module writes submitted settings to the page TSconfig without restricting them to the configuration options of the module. Backend users with access to the mail module can write arbitrary page TSconfig.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Source: CVE Program / CVE List V5

Vulnerability Type

输出中的特殊元素转义处理不恰当(注入)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
TYPO3	Extension "Mail"	4.0.0 ~ 4.2.0	-

II. Public POCs for CVE-2026-120329

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-120329

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Other References for CVE-2026-120329 (1)

https://typo3.org/security/advisory/typo3-ext-sa-2026-037 vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120329

Same Patch Batch · TYPO3 · 2026-11-03 · 7 CVEs total

CVE-2026-120333	8.8 HIGH	Broken Access Control in extension "Frontend User Registration" (sf_register)
CVE-2026-120330	7.1 HIGH	Broken Access Control in extension "Mail" (mail)
CVE-2026-120328	6.9 MEDIUM	Information Disclosure in extension "Mail" (mail)
CVE-2026-120327	5.3 MEDIUM	Open Redirection in extension "Mail" (mail)
CVE-2026-120331	5.3 MEDIUM	Server-Side Request Forgery in extension "Mail" (mail)
CVE-2026-120332	5.1 MEDIUM	Cross-Site Scripting in extension "Mail" (mail)

IV. Related Vulnerabilities

Same product: Extension "Mail"

Same vendor: TYPO3

Same weakness: CWE-74