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Cross site scripting via canonical tag in Contao

High severity GitHub Reviewed Published May 5, 2022 in contao/contao • Updated Apr 22, 2024

Package

composer contao/contao (Composer)

Affected versions

>= 4.13.0, < 4.13.3

Patched versions

4.13.3
composer contao/core-bundle (Composer)
>= 4.13.0, < 4.13.3
4.13.3

Description

Impact

Untrusted users can inject malicious code into the canonical tag, which is then executed on the web page (front end).

Patches

Update to Contao 4.13.3.

Workarounds

Disable canonical tags in the root page settings.

References

https://contao.org/en/security-advisories/cross-site-scripting-via-canonical-url

For more information

If you have any questions or comments about this advisory, open an issue in contao/contao.

References

@leofeyer leofeyer published to contao/contao May 5, 2022
Published by the National Vulnerability Database May 6, 2022
Published to the GitHub Advisory Database May 20, 2022
Reviewed May 20, 2022
Last updated Apr 22, 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
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:N/S:C/C:L/I:L/A:N

EPSS score

0.342%
(72nd percentile)

Weaknesses

CVE ID

CVE-2022-24899

GHSA ID

GHSA-m8x6-6r63-qvj2

Source code

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