EUVD-2026-65340
GHSA-6956-f2gq-2c74
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Unauthenticated network SSTI (PR:N/UI:N/AC:L); template engine reaches OS/config beyond the app so S:C, with full C/I/A impact from disclosure and potential RCE.
Primary rating from Vendor (TYPO3).
CVSS VectorVendor: TYPO3
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Server-side template injection in the TYPO3 'Powermail' extension lets an anonymous user submit Fluid template syntax through any form field configured as the sender-name field, which the extension renders as raw template source. Because the value is passed unsanitized into a Fluid View, attackers can invoke arbitrary Fluid ViewHelpers to read server configuration, environment variables and application source, and in many deployments achieve remote code execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The concrete prerequisite is that a Powermail form has at least one field configured with the 'This field contains the name of the sender' (sender_name) marker - the description states this is a common, default-adjacent Powermail configuration. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority issue rather than a paper-tiger high CVSS. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the fixed Powermail release identified in TYPO3 advisory TYPO3-EXT-SA-2026-022 (https://typo3.org/security/advisory/typo3-ext-sa-2026-022); the input does not include an exact fix version, so retrieve it from that advisory rather than relying on a guessed number - patch available per vendor advisory, released patched version not independently confirmed here. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Immediate (24 hours): Identify all systems running TYPO3 Powermail extension and assess internet exposure; establish incident response plan for extension disablement. …
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