TYPO3 is a free and open source Content Management Framework released under the GNU General Public License. In affected versions the TYPO3 core component `GeneralUtility::getIndpEnv()` uses the unfiltered server environment variable `PATH_INFO`, which allows attackers to inject malicious content. In combination with the TypoScript setting `config.absRefPrefix=auto`, attackers can inject malicious HTML code to pages that have not been rendered and cached, yet. As a result, injected values would be cached and delivered to other website visitors (persisted cross-site scripting). Individual code which relies on the resolved value of `GeneralUtility::getIndpEnv('SCRIPT_NAME')` and corresponding usages (as shown below) are vulnerable as well. Additional investigations confirmed that at least Apache web server deployments using CGI (FPM, FCGI/FastCGI, and similar) are affected. However, there still might be the risk that other scenarios like nginx, IIS, or Apache/mod_php are vulnerable. The usage of server environment variable `PATH_INFO` has been removed from corresponding processings in `GeneralUtility::getIndpEnv()`. Besides that, the public property `TypoScriptFrontendController::$absRefPrefix` is encoded for both being used as a URI component and for being used as a prefix in an HTML context. This mitigates the cross-site scripting vulnerability. Users are advised to update to TYPO3 versions 8.7.51 ELTS, 9.5.40 ELTS, 10.4.35 LTS, 11.5.23 LTS and 12.2.0 which fix this problem. For users who are unable to patch in a timely manner the TypoScript setting `config.absRefPrefix` should at least be set to a static path value, instead of using auto - e.g. `config.absRefPrefix=/`. This workaround **does not fix all aspects of the vulnerability**, and is just considered to be an intermediate mitigation to the most prominent manifestation.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - TYPO3 is a free and open source Content Management Framework released under the GNU General Public
    License. In affected versions the TYPO3 core component `GeneralUtility::getIndpEnv()` uses the unfiltered
    server environment variable `PATH_INFO`, which allows attackers to inject malicious content. In
    combination with the TypoScript setting `config.absRefPrefix=auto`, attackers can inject malicious HTML
    code to pages that have not been rendered and cached, yet. As a result, injected values would be cached
    and delivered to other website visitors (persisted cross-site scripting). Individual code which relies on
    the resolved value of `GeneralUtility::getIndpEnv('SCRIPT_NAME')` and corresponding usages (as shown
    below) are vulnerable as well. Additional investigations confirmed that at least Apache web server
    deployments using CGI (FPM, FCGI/FastCGI, and similar) are affected. However, there still might be the
    risk that other scenarios like nginx, IIS, or Apache/mod_php are vulnerable. The usage of server
    environment variable `PATH_INFO` has been removed from corresponding processings in
    `GeneralUtility::getIndpEnv()`. Besides that, the public property
    `TypoScriptFrontendController::$absRefPrefix` is encoded for both being used as a URI component and for
    being used as a prefix in an HTML context. This mitigates the cross-site scripting vulnerability. Users
    are advised to update to TYPO3 versions 8.7.51 ELTS, 9.5.40 ELTS, 10.4.35 LTS, 11.5.23 LTS and 12.2.0
    which fix this problem. For users who are unable to patch in a timely manner the TypoScript setting
    `config.absRefPrefix` should at least be set to a static path value, instead of using auto - e.g.
    `config.absRefPrefix=/`. This workaround **does not fix all aspects of the vulnerability**, and is just
    considered to be an intermediate mitigation to the most prominent manifestation. (CVE-2023-24814)

The version of TYPO3 installed on the remote host is prior to 8.7.0 < 8.7.51 ELTS / 9.0.0 < 9.5.40 ELTS / 10.0.0 < 10.4.36 / 11.0.0 < 11.5.23 / 12.0.0 < 12.2.0. It is, therefore, affected by a vulnerability as referenced in the TYPO3-CORE-SA-2023-001 advisory.

  - TYPO3 core component GeneralUtility::getIndpEnv() uses the unfiltered server environment variable     PATH_INFO, which allows attackers to inject malicious content. In combination with the TypoScript setting     config.absRefPrefix=auto, attackers can inject malicious HTML code into pages that have not yet been     rendered and cached. As a result, injected values would be cached and delivered to other website visitors     (persisted cross-site scripting). Individual code which relies on the resolved value of     GeneralUtility::getIndpEnv('SCRIPT_NAME') and corresponding usages (as shown below) are vulnerable as     well. GeneralUtility::getIndpEnv('PATH_INFO') GeneralUtility::getIndpEnv('SCRIPT_NAME')     GeneralUtility::getIndpEnv('TYPO3_REQUEST_DIR') GeneralUtility::getIndpEnv('TYPO3_REQUEST_SCRIPT')     GeneralUtility::getIndpEnv('TYPO3_SITE_PATH') GeneralUtility::getIndpEnv('TYPO3_SITE_SCRIPT')     GeneralUtility::getIndpEnv('TYPO3_SITE_URL') Installations of TYPO3 versions 8.7 and 9.x are probably only     affected when server environment variable TYPO3_PATH_ROOT is defined - which is the case if they were     installed via Composer. Additional investigations confirmed that Apache and Microsoft IIS web servers     using PHP-CGI (FPM, FCGI/FastCGI, or similar) are affected. There might be the risk that nginx is     vulnerable as well. It was not possible to exploit Apache/mod_php scenarios. (CVE-2023-24814)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
418478	SCA: security update for typo3/cms, typo3/cms-core (GHSA-r4f8-f93x-5qh3)	Tenable Cloud Security	SCA Checks	medium
418478	SCA: security update for typo3/cms, typo3/cms-core (GHSA-r4f8-f93x-5qh3)	Tenable Self-Hosted Container Security	SCA Checks	medium
171074	TYPO3 8.7.0 < 8.7.51 ELTS / 9.0.0 < 9.5.40 ELTS / 10.0.0 < 10.4.36 / 11.0.0 < 11.5.23 / 12.0.0 < 12.2.0 XSS (TYPO3-CORE-SA-2023-001)	Nessus	CGI abuses	medium

Detections

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CVE-2023-24814

medium

Tenable Plugins

medium

medium

medium