GHSA-4mqv-gcr3-pff9
Cross-site scripting in phpoffice/phpspreadsheet
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | phpoffice/phpspreadsheet | < 1.16.0 | 1.16.0 |
| Packagist | phpoffice/phpexcel | <= 1.8.2 | no fix listed |
Details
As written in the advisory (Markdown source, shown as plain text).
This affects the package phpoffice/phpspreadsheet. The library is vulnerable to XSS when creating an html output from an excel file by adding a comment on any cell. The root cause of this issue is within the HTML writer where user comments are concatenated as part of link and this is returned as HTML.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2020-7776
- https://github.com/PHPOffice/PhpSpreadsheet/pull/1719
- https://github.com/PHPOffice/PhpSpreadsheet/commit/0ed5b800be2136bcb8fa9c1bdf59abc957a98845
- https://github.com/FriendsOfPHP/security-advisories/blob/master/phpoffice/phpspreadsheet/CVE-2020-7776.yaml
- https://github.com/PHPOffice/PhpSpreadsheet/blob/master/src/PhpSpreadsheet/Writer/Html.php%23L1792
- https://snyk.io/vuln/SNYK-PHP-PHPOFFICEPHPSPREADSHEET-1048856