CVE-2026-35453

PhpSpreadsheet contains an XSS vulnerability in the HTML Writer when a cell uses a custom number format with an @ placeholder and additional literal text. The formatter returns early and escaping via htmlspecialchars() is skipped, allowing injected HTML/JavaScript in the generated HTML. Affected ...

CVE-2024-45046

Technical details about CVE-2024-45046 are not publicly provided in the documents you shared. No explicit affected products/versions, impact, or remediation are stated here. Monitor for updates from the sources for concrete information.

CVE-2024-56410

PhpSpreadsheet has an XSS vulnerability in custom properties affecting the PhpSpreadsheet Writer Html path (class PhpOffice\PhpSpreadsheet\Writer\Html, generateMeta). Affected versions: < 3.7.0, < 2.3.5, < 2.1.6, and

CVE-2024-56411

CVE-2024-56411 concerns PhpSpreadsheet: an XSS vulnerability in the hyperlink base used when generating HTML headers via PhpOffice\PhpSpreadsheet\Writer\Html. The issue arises because the HTML page header is built without sanitizing the hyperlink base, potentially allowing malicious payloads when...

CVE-2024-56412

PhpSpreadsheet vulnerability CVE-2024-56412 allows bypassing the XSS sanitizer via the javascript protocol and special characters in the Writer\Html component (generateRow). Affected versions are before 3.7.0, 2.3.5, 2.1.6, and 1.29.7. The issue can cause an attacker-created HTML link to be gener...

CVE-2024-45292

PHPSpreadsheet’s HTML writer (PhpOffice\PhpSpreadsheet\Writer\Html) is affected by a Cross-Site Scripting (XSS) vulnerability due to insufficient sanitization of javascript: URLs in href attributes. The issue is fixed in releases 1.29.2, 2.1.1, and 2.3.0; upgrading to one of these versions (or n...

CVE-2026-40296

PhpSpreadsheet is affected by a stored XSS in the HTML writer when a cell uses a custom number format containing the text placeholder @. If the formatted value diverges from the original value (e.g., formats like ". @", "@ ", or "x@"), htmlspecialchars() escaping is skipped, allowing unescaped HT...