Find real vulnerabilities before they ship
PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.4, 2.1.16, 2.4.5, 3.10.5, and 5.7.0, the XLSX reader's ColumnAndRowAttributes::readRowAttributes() method reads row numbers from XML attributes without validating them against the spreadsheet maximum row limit (AddressRange::MAX_ROW = 1,048,576). An attacker can craft a minimal XLSX file (~1.6KB) containing a <row r="999999999"/> element that inflates cachedHighestRow to 999,999,999, causing any subsequent row iteration to attempt ~1 billion loop cycles and exhaust CPU resources. This vulnerability is fixed in 1.30.4, 2.1.16, 2.4.5, 3.10.5, and 5.7.0.
Base Score
7.5| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| phpoffice/phpspreadsheet(Packagist) | 4.0.0 | 5.7.0 | N/A |
| phpoffice/phpspreadsheet(Packagist) | 3.3.0 | 3.10.5 | N/A |
| phpoffice/phpspreadsheet(Packagist) | 2.2.0 | 2.4.5 | N/A |
| phpoffice/phpspreadsheet(Packagist) | 2.0.0 | 2.1.16 | N/A |
| phpoffice/phpspreadsheet(Packagist) | 0 | 1.30.4 | N/A |
| Base Score | 7.5 |
|---|---|
| Vector String | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Base Severity | High |
| Version | 3.1 |
| Attack Vector (AV) | NETWORK |
