CVE-2026-35453— PhpSpreadsheet XSS via number format text substitution in HTML Writer

PhpSpreadsheet XSS via number format text substitution in HTML Writer

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.3 and earlier, 2.0.0 through 2.1.15, 2.2.0 through 2.4.4, 3.3.0 through 3.10.4, and 4.0.0 through 5.6.0, the HTML Writer skips htmlspecialchars() output escaping when a cell uses a custom number format containing the @ text placeholder with additional literal text (e.g., @ "items"). The escaping is only applied when the formatted output strictly equals the original cell value. When the format code contains @ with quoted literal text, the formatter substitutes the raw cell value into the format string and returns early without invoking the escaping callback. An attacker who can control cell content in a spreadsheet processed by the HTML Writer can inject arbitrary HTML and JavaScript into the generated output. This issue has been fixed in versions 1.30.4, 2.1.16, 2.4.5, 3.10.5, and 5.7.0.

N/A

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

PhpSpreadsheet 跨站脚本漏洞

PhpSpreadsheet是PHPOffice开源的一款用于读取和写入电子表格文件的PHP库。 PhpSpreadsheet存在跨站脚本漏洞，该漏洞源于HTML Writer在单元格使用包含@文本占位符的自定义数字格式时跳过htmlspecialchars输出转义，可能导致注入任意HTML和JavaScript。以下版本受到影响：1.30.3及之前版本、2.0.0至2.1.15版本、2.2.0至2.4.4版本、3.3.0至3.10.4版本和4.0.0至5.6.0版本。

N/A

N/A