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Cross-site scripting in phpoffice/phpspreadsheet

Moderate severity GitHub Reviewed Published May 6, 2021 to the GitHub Advisory Database • Updated Feb 2, 2024

Package

composer phpoffice/phpspreadsheet (Composer)

Affected versions

< 1.16.0

Patched versions

1.16.0

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.

References

Published by the National Vulnerability Database Dec 9, 2020
Reviewed Apr 9, 2021
Published to the GitHub Advisory Database May 6, 2021
Last updated Feb 2, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS score

0.086%
(39th percentile)

Weaknesses

CVE ID

CVE-2020-7776

GHSA ID

GHSA-4mqv-gcr3-pff9

Source code

No known source code
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