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CVE-2022-33154: Cross-Site Scripting in extension "Embedding schema.org vocabulary" (schema)

The schema (aka Embedding schema.org vocabulary) extension before 1.13.1 and 2.x before 2.5.1 for TYPO3 allows XSS.

CVE
#xss#vulnerability#perl

Tue. 14th June, 2022

It has been discovered that the extension “Embedding schema.org vocabulary” (schema) is susceptible to Cross-Site Scripting.

  • Release Date: June 14, 2022
  • Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
  • Component: “Embedding schema.org vocabulary” (schema)
  • Vulnerability Type: Cross-Site Scripting
  • Affected Versions: 1.13.0 and below, 2.0.0 - 2.5.0
  • Severity: Medium
  • Suggested CVSS: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C
  • References: CVE-2022-33154

Problem Description

The extension fails to properly encode user input for output in HTML context. A TYPO3 backend user account is required to exploit the vulnerability.

Solution

Updated versions 1.13.1 and 2.5.1 are available from the TYPO3 extension manager, packagist and at
https://extensions.typo3.org/extension/download/schema/1.13.1/zip
https://extensions.typo3.org/extension/download/schema/2.5.1/zip
Users of the extension are advised to update the extension as soon as possible.

Credits

Thanks to Chris Müller for reporting the vulnerability and for providing updated versions of the extension.

General Advice

Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.

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The extension fails to properly encode user input for output in HTML context. A TYPO3 backend user account is required to exploit the vulnerability.

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