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.
{ "nvd_published_at": "2020-12-09T17:15:00Z", "cwe_ids": [ "CWE-79" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2021-04-09T21:12:55Z" }