Thelia CSV Export Formula Injection Vulnerability Fix Analysis

Vulnerability Overview This vulnerability involves cell contents being interpreted as formulas during CSV file export, leading to potential security issues. Specifically, when exporting text containing special characters (such as , , , , , ), these texts are parsed as formulas in spreadsheet software, potentially executing malicious operations. Scope of Impact Affected Files: - - - - Impact Scenarios: - When exporting CSV files, if cell contents contain the aforementioned special characters, they will be parsed as formulas by spreadsheet software, potentially causing data leakage or the execution of malicious code. Remediation Plan 1. Add Class: - Add the class in to detect and neutralize text that might be interpreted as formulas. - This class includes two main methods: - : Neutralizes a single value; if the value starts with a special character, it prepends an apostrophe ( ). - : Neutralizes all values in specified columns. 2. Modify Class: - In , use the class to neutralize the value of each cell, ensuring that text in the exported CSV file is not parsed as a formula. 3. Update Test Cases: - Add test cases in and to verify the effectiveness of the fix. POC Code Below are the key code snippets after the fix: ```php serialize($value)); } public static function provideNeutralizeCases(): iterable { yield 'plain text' => ['plain text', 'plain text']; yield 'number' => ['123', '123']; yield 'formula trigger' => ['=1+2', "'=1+2"]; yield 'formula trigger with number' => ['+1+2', "'+1+2"]; yield 'formula trigger with special character' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'formula trigger with at' => ['@1+2', "'@1+2"]; yield 'formula trigger with less than' => [' ['>1+2', "'>1+2"]; yield 'formula trigger with minus' => ['-1+2', "'-1+2"]; yield 'formula trigger with plus' => ['+1+2', "'+1+2"]; yield 'formula trigger with equals' => ['=1+2', "'=1+2"]; yield 'f

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Thelia CSV Export Formula Injection Vulnerability Fix Analysis

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