TYPO3 Powermail up to 10.9.2/12.6.0/13.2.0 Fluid View sender_name code injection

Summaryinfo

A vulnerability was found in TYPO3 Powermail up to 10.9.2/12.6.0/13.2.0. It has been classified as critical. The impacted element is an unknown function of the component Fluid View. The manipulation of the argument sender_name leads to code injection. This vulnerability is listed as CVE-2026-77136. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in TYPO3 Powermail up to 10.9.2/12.6.0/13.2.0. It has been rated as critical. This issue affects an unknown code block of the component Fluid View. The manipulation of the argument sender_name with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at typo3.org. The identification of this vulnerability is CVE-2026-77136 since 08/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

Upgrading to version 10.9.3, 12.6.1 or 13.2.1 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• TYPO3

Name

• Powermail

Version

• 10.9.0
• 10.9.1
• 10.9.2
• 12.0
• 12.1
• 12.2
• 12.3
• 12.4
• 12.5
• 12.6.0
• 13.0
• 13.1
• 13.2.0

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒
• 🔒

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Entryinfo

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