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CVE-2026-77136— Server-Side Template Injection in extension "powermail" (powermail)

Quick assessment

Affected
TYPO3 Extension "powermail"
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.

TYPO3 powermail是TYPO3组织的一款功能强大的表单扩展组件。 TYPO3 powermail 10.9.3之前版本、11.0.0至12.6.1之前版本和13.0.0至13.2.1之前版本存在代码注入漏洞，该漏洞源于将配置为“包含发件人姓名”的表单字段原始值直接作为Fluid模板源渲染且未经清理，可能导致服务器配置、环境变量和应用程序源代码泄露及远程代码执行。

CVSS 9.5 · Critical EPSS 0.97% · P61

Affected Version Matrix 3

VendorProduct Version RangeStatus
TYPO3 Extension "powermail" 13.0.0< 13.2.1 affected
11.0.0< 12.6.1 affected
< 10.9.3 affected
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I. Basic Information for CVE-2026-77136

Vulnerability Information
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Vulnerability Title
Server-Side Template Injection in extension "powermail" (powermail)
Source: CVE Program / CVE List V5
Vulnerability Description
The extension passes the raw value of a form field configured as "This field contains the name of the sender" directly into a Fluid View as template source, without any sanitization, and renders it. An anonymous, unauthenticated user can submit Fluid template syntax in that field to execute arbitrary Fluid ViewHelpers leading to disclosure of server configuration, environment variables and application source, and potentially remote code execution. Exploitation requires only that a form field is configured as the sender_name field, a common and default-adjacent Powermail configuration. No authentication or user interaction beyond a normal form submission is required. This vulnerability is reported to be actively exploited in the wild.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5
Vulnerability Title
TYPO3 powermail 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TYPO3 powermail是TYPO3组织的一款功能强大的表单扩展组件。 TYPO3 powermail 10.9.3之前版本、11.0.0至12.6.1之前版本和13.0.0至13.2.1之前版本存在代码注入漏洞，该漏洞源于将配置为“包含发件人姓名”的表单字段原始值直接作为Fluid模板源渲染且未经清理，可能导致服务器配置、环境变量和应用程序源代码泄露及远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TYPO3 Extension "powermail" 13.0.0 ~ 13.2.1 -

II. Public POCs for CVE-2026-77136

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III. Intelligence Information for CVE-2026-77136

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Vendor Advisories for CVE-2026-77136 (1)

Same Patch Batch · TYPO3 · 2026-08-25 · 24 CVEs total

CVE-2026-77138 9.3 CRITICAL Remote Code Execution in extension "HTML5 Video Player vs. Powermail" (html5videoplayer_po
CVE-2026-77142 8.8 HIGH Broken Access Control in extension "Industry Directory" (yellowpages2)
CVE-2026-77143 8.8 HIGH Broken Access Control in extension "Forum" (pforum)
CVE-2026-77141 8.8 HIGH Broken Access Control in extension "Club Directory" (clubdirectory)
CVE-2026-77140 8.7 HIGH Broken Access Control in extension "Telephone Directory" (telephonedirectory)
CVE-2026-77146 8.3 HIGH Broken Access Control in extension "femanager" (femanager)
CVE-2026-77134 8.3 HIGH Broken Access Control in extension "femanager" (femanager)
CVE-2026-77135 8.2 HIGH Information Disclosure in extension "femanager" (femanager)
CVE-2026-77129 7.7 HIGH Server-Side Template Injection in extension "Event management and registration" (sf_event_
CVE-2026-77137 7.7 HIGH SQL Injection in extension "Forms Export" (frp_form_answers)
CVE-2026-56095 7.7 HIGH Insecure Deserialization in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-56092 7.6 HIGH Broken Access Control in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-77144 7.1 HIGH Broken Access Control in extension "Events 2" (events2)
CVE-2026-77145 7.1 HIGH Broken Access Control in extension "Events 2" (events2)
CVE-2026-56094 6.3 MEDIUM Information Disclosure in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-56093 6.3 MEDIUM Broken Access Control in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-56096 6.3 MEDIUM Information Disclosure in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-77128 6.3 MEDIUM Broken Access Control in extension "Event management and registration" (sf_event_mgt)
CVE-2026-77139 6.0 MEDIUM Path Traversal in extension "Mask" (mask)
CVE-2026-77127 6.0 MEDIUM Information Disclosure in extension "Modules" (modules)

Showing top 20 of 24 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Extension "powermail"
Same vendor: TYPO3
Same weakness: CWE-1336

V. Comments for CVE-2026-77136

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