{"id":"CVE-2020-7776","aliases":["EUVD-2021-0945","GHSA-4mqv-gcr3-pff9","SNYK-PHP-PHPOFFICEPHPSPREADSHEET-1048856"],"status":"published","title":"Cross-site Scripting (XSS)","description":"This affects the package phpoffice/phpspreadsheet from 0.0.0. 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. A fix for this issue is available on commit 0ed5b800be2136bcb8fa9c1bdf59abc957a98845/master branch.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01317,"percentile":0.71028,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2020-12-09T16:45:18Z","modified":"2026-10-20T10:53:30Z","fixes":[{"ecosystem":"Packagist","package":"phpoffice/phpspreadsheet","fixed_in":["1.16.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"phpoffice/phpspreadsheet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.0"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"phpoffice/phpexcel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.8.2"}]}]},{"source":"osv","ecosystem":"Packagist","package":"phpoffice/phpspreadsheet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.0"}]}],"versions":["1.0.0","1.0.0-beta","1.0.0-beta2","1.1.0","1.10.0","1.10.1","1.11.0","1.12.0","1.13.0","1.14.0","1.14.1","1.15.0","1.2.0","1.2.1","1.3.0","1.3.1","1.4.0","1.4.1","1.5.0","1.5.1","1.5.2","1.6.0","1.7.0","1.8.0","1.8.1","1.8.2","1.9.0"]},{"source":"osv","ecosystem":"Packagist","package":"phpoffice/phpexcel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.8.2"}]}],"versions":["1.7.9","1.7.9-rc1","1.8.0","1.8.0rc1","1.8.0rc2","1.8.0rc3","1.8.0rc4","1.8.1","1.8.2"]}],"products":[{"vendor":"phpoffice","product":"phpspreadsheet"}],"references":[{"url":"https://snyk.io/vuln/SNYK-PHP-PHPOFFICEPHPSPREADSHEET-1048856","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/0ed5b800be2136bcb8fa9c1bdf59abc957a98845","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/blob/master/src/PhpSpreadsheet/Writer/Html.php%23L1792","tags":["x_refsource_MISC","x_transferred","Broken Link","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-7776","tags":["advisory"]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/pull/1719","tags":["web"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/phpoffice/phpspreadsheet/CVE-2020-7776.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-4mqv-gcr3-pff9"}],"sources":{"cve":[{"id":"CVE-2020-7776","title":"Cross-site Scripting (XSS)","description":"This affects the package phpoffice/phpspreadsheet from 0.0.0. 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. A fix for this issue is available on commit 0ed5b800be2136bcb8fa9c1bdf59abc957a98845/master branch.","status":"published","published":"2020-12-09T16:45:18.358Z","modified":"2024-09-16T19:39:56.39Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:35:58.787905Z"}],"euvd":[{"id":"EUVD-2021-0945","description":"This affects the package phpoffice/phpspreadsheet from 0.0.0. 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. A fix for this issue is available on commit 0ed5b800be2136bcb8fa9c1bdf59abc957a98845/master branch.","status":"published","published":"2020-12-09T16:45:18Z","modified":"2024-09-16T19:39:56Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-03T00:55:21.523281Z"}],"ghsa":[{"id":"GHSA-4mqv-gcr3-pff9","title":"Cross-site scripting in phpoffice/phpspreadsheet","description":"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.","status":"published","published":"2021-05-06T18:53:37Z","modified":"2025-03-06T18:08:50Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:38:34.185137Z"}],"nvd":[{"id":"CVE-2020-7776","description":"This affects the package phpoffice/phpspreadsheet from 0.0.0. 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. A fix for this issue is available on commit 0ed5b800be2136bcb8fa9c1bdf59abc957a98845/master branch.","status":"published","published":"2020-12-09T17:15:31.883Z","modified":"2026-06-17T03:25:25.603Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:27.10541Z"}],"osv":[{"id":"CVE-2020-7776","description":"This affects the package phpoffice/phpspreadsheet from 0.0.0. 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. A fix for this issue is available on commit 0ed5b800be2136bcb8fa9c1bdf59abc957a98845/master branch.","status":"published","published":"2020-12-09T17:15:31.883Z","modified":"2026-10-20T10:53:30.603978287Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:17.34531Z"},{"id":"GHSA-4mqv-gcr3-pff9","title":"Cross-site scripting in phpoffice/phpspreadsheet","description":"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.","status":"published","published":"2021-05-06T18:53:37Z","modified":"2026-07-08T06:49:43.508214068Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:37.148947Z"}]}}