CVE-2020-7776

Public Exploit
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.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.34%
Third-Party Advisory github.com Third-Party Advisory snyk.io
Affected: n/a phpoffice/phpspreadsheet
Published at:
Updated at:

References

Link Tags
https://snyk.io/vuln/SNYK-PHP-PHPOFFICEPHPSPREADSHEET-1048856 third party advisory exploit
https://github.com/PHPOffice/PhpSpreadsheet/commit/0ed5b800be2136bcb8fa9c1bdf59abc957a98845 third party advisory patch
https://github.com/PHPOffice/PhpSpreadsheet/blob/master/src/PhpSpreadsheet/Writer/Html.php%23L1792 broken link

Frequently Asked Questions

What is the severity of CVE-2020-7776?
CVE-2020-7776 has been scored as a high severity vulnerability.
How to fix CVE-2020-7776?
To fix CVE-2020-7776, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-7776 being actively exploited in the wild?
It is possible that CVE-2020-7776 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-7776?
CVE-2020-7776 affects n/a phpoffice/phpspreadsheet.
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