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The filename of uploaded files vulnerable to stored XSS

High severity GitHub Reviewed Published Jun 8, 2020 in bolt/bolt • Updated Jan 28, 2023

Package

composer bolt/bolt (Composer)

Affected versions

< 3.7.1

Patched versions

3.7.1

Description

Impact

The filename of uploaded files was vulnerable to stored XSS. It is not possible to inject javascript code in the file name when creating/uploading the file. But, once created/uploaded, it can be renamed to inject the payload in it.

Additionally, the measures to prevent renaming the file to disallowed filename extensions could be circumvented.

Patches

This is fixed in Bolt 3.7.1.

References

Related issue: bolt/bolt#7853

References

@bobdenotter bobdenotter published to bolt/bolt Jun 8, 2020
Published by the National Vulnerability Database Jun 8, 2020
Reviewed Jun 8, 2020
Published to the GitHub Advisory Database Jun 9, 2020
Last updated Jan 28, 2023

Severity

High

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
None
User interaction
Required
Scope
Changed
Confidentiality
None
Integrity
High
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:N/UI:R/S:C/C:N/I:H/A:N

EPSS score

0.624%
(79th percentile)

Weaknesses

CVE ID

CVE-2020-4041

GHSA ID

GHSA-68q3-7wjp-7q3j

Source code

Credits

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