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silverstripe/framework BackURL validation bypass with malformed URLs

High severity GitHub Reviewed Published May 27, 2024 to the GitHub Advisory Database • Updated May 27, 2024

Package

composer silverstripe/framework (Composer)

Affected versions

>= 4.0.0-rc1, < 4.0.4
>= 4.1.0-rc1, < 4.1.1

Patched versions

4.0.4
4.1.1

Description

A carefully constructed malformed URL can be used to circumvent the offsite redirection protection used on BackURL parameters. This could lead to users entering sensitive data in malicious websites instead of the intended one.

References

Published to the GitHub Advisory Database May 27, 2024
Reviewed May 27, 2024
Last updated May 27, 2024

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
None
Scope
Unchanged
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:N/S:U/C:N/I:H/A:N

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-m5q3-mvcr-gc5m

Source code

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