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The TYPO3 security advisory explicitly names FormEngine and DataHandler as vulnerable components. Both components handle serialized data structures (FlexForms) in backend operations. The vulnerability stems from processing user-controlled serialized data without proper validation. DataHandler's process_datamap handles form submissions containing serialized FlexForm values, while FormEngine's methods retrieve and process these values during form rendering. The patch in versions 8.7.27/9.5.8 likely added validation checks or replaced unsafe deserialization methods. The high confidence comes from the direct correlation between the advisory's component references and these core data processing functions.
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| typo3/cms-core | composer | >= 8.0.0, < 8.7.27 | 8.7.27 |
| typo3/cms-core | composer | >= 9.0.0, < 9.5.8 | 9.5.8 |
| typo3/cms | composer | >= 8.0.0, < 8.7.27 | 8.7.27 |
| typo3/cms | composer | >= 9.0.0, < 9.5.8 | 9.5.8 |
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