CVE-2020-7776

Cross-site Scripting (XSS)

MEDIUM
6.4
CVSS Score
Published: December 9, 2020 at 04:45 PM UTC
Updated: June 17, 2026 at 03:25 AM UTC
1 product affected across 1 vendorPhpSpreadsheet

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Severity
MEDIUM6.4
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≥ 0.0.0v < 1.16.00.0.0
Affected range stops below 1.16.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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