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TYPO3 Cross-Site Scripting in Fluid ViewHelpers

Moderate severity GitHub Reviewed Published May 30, 2024 to the GitHub Advisory Database • Updated Jul 16, 2026

Package

composer typo3/cms-fluid (Composer)

Affected versions

>= 8.0.0, < 8.7.23
>= 9.0.0, < 9.5.4

Patched versions

8.7.23
9.5.4

Description

Failing to properly encode user input, templates using built-in Fluid ViewHelpers are vulnerable to cross-site scripting.

References

Published to the GitHub Advisory Database May 30, 2024
Reviewed May 30, 2024
Last updated Jul 16, 2026

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
None
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:N/UI:R/S:C/C:L/I:L/A:N

EPSS score

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

CVE ID

No known CVE

GHSA ID

GHSA-22q7-cg4r-p9mx

Source code

Credits

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