7.2

CVSS Score

4.0

-

CVSS Score

Basic Information

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CVE-2026-47343

CVE-2026-47343: TYPO3 CMS - Destructive Actions on File Mount Folders

Non-privileged backend users with file mount access were able to perform write operations (move, delete, rename) on folders representing the root of an active file mount due to missing authorization restrictions. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0 through 11.5.50, 12.0.0 through 12.4.45, 13.0.0 through 13.4.30, and 14.0.0 through 14.3.2.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2026-47343

CVE-2026-47343:

7.2

CVSS Score

4.0

-

CVSS Score

Basic Information

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Technical Details

SSVC / BOD 26-04 ↗

Exploitation NoneAutomatable NoTech Impact Partial

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Package Name	Ecosystem	Vulnerable Versions	First Patched Version
typo3/cms-core	composer	< 10.4.57	10.4.57
typo3/cms-core	composer	>= 11.0.0, < 11.5.51	11.5.51
typo3/cms-core	composer	>= 12.0.0, < 12.4.46	12.4.46
typo3/cms-core	composer	>= 13.0.0, < 13.4.31	13.4.31
typo3/cms-core	composer	>= 14.0.0, < 14.3.3	14.3.3

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The analysis of the provided security patches for TYPO3 CMS reveals that the vulnerability lies within the typo3/sysext/core/Classes/Resource/ResourceStorage.php file. Specifically, the checkFolderActionPermission function was missing crucial authorization checks. Before the patch, this function did not verify whether a user had the permissions to perform destructive operations like 'move', 'delete', or 'rename' on a folder that is the root of a file mount. This allowed non-privileged users to perform such actions, leading to potential data loss or unauthorized modifications. The fix involves adding a new check within checkFolderActionPermission. This check calls a new helper function, isAllowedActionOnMountFolder, which determines if the folder is a mount root and if the action is one of the denied destructive operations. If both conditions are true, the action is blocked. Therefore, the checkFolderActionPermission function is the primary vulnerable function that would appear in a runtime profile when this vulnerability is exploited.

Vulnerable functions

TYPO3\CMS\Core\Resource\ResourceStorage::checkFolderActionPermission

typo3/sysext/core/Classes/Resource/ResourceStorage.php

The vulnerability existed because the `checkFolderActionPermission` function did not have a mechanism to block destructive actions (move, delete, rename) on folders that served as the root of a file mount. This allowed non-privileged users to perform these operations. The patch introduces a call to the new `isAllowedActionOnMountFolder` function, which explicitly checks for and denies these actions on such folders.

Vulnerability Intelligence
Miggo AI

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WAF Protection Rules

WAF Rule

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Reasoning

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