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TYPO3 Cross-Site Scripting in Frontend User Login

Moderate severity GitHub Reviewed Published Jun 7, 2024 to the GitHub Advisory Database

Package

composer typo3/cms (Composer)

Affected versions

>= 7.0.0, < 7.6.32
>= 8.0.0, < 8.7.21
>= 9.0.0, < 9.5.2

Patched versions

7.6.32
8.7.21
9.5.2

Description

Failing to properly encode user input, login status display is vulnerable to cross-site scripting in the website frontend. A valid user account is needed in order to exploit this vulnerability - either a backend user or a frontend user having the possibility to modify their user profile.

Template patterns that are affected are

  • ###FEUSER_[fieldName]### using system extension felogin
  • for regular frontend rendering (pattern can be defined individually using TypoScript setting config.USERNAME_substToken)

References

Published to the GitHub Advisory Database Jun 7, 2024
Reviewed Jun 7, 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
Required
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:R/S:C/C:L/I:L/A:N

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-2rcw-9hrm-8q7q

Source code

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