CVE-2020-7776

PoC —

CVSS 3.1

6.4 medium

EPSS

1%p69

Published

Dec 9, 2020 (Dec 9, 2020)

Modified

Jun 17, 2026

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.

Vendors: phpoffice
Products: phpspreadsheet
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (1.3%)

In the news0 stories

No ingested article mentions this CVE yet.