CVE-2020-26229: XML External Entity in Dashboard Widget
Problem It has been discovered that RSS widgets are susceptible to XML external entity processing. This vulnerability is reasonable, but is theoretical - it was not possible to actually reproduce the vulnerability with current PHP versions of supported and maintained system distributions.
At least with libxml2 version 2.9, the processing of XML external entities is disabled per default - and cannot be exploited. Besides that, a valid backend user account is needed.
Solution Update to TYPO3 version 10.4.10 that fixes the problem described.
Other sources
TYPO3 is an open source PHP based web content management system. In TYPO3 from version 10.4.0, and before version 10.4.10, RSS widgets are susceptible to XML external entity processing. This vulnerability is reasonable, but is theoretical - it was not possible to actually reproduce the vulnerability with current PHP versions of supported and maintained system distributions. At least with libxml2 version 2.9, the processing of XML external entities is disabled per default - and cannot be exploited. Besides that, a valid backend user account is needed. Update to TYPO3 version 10.4.10 to fix the problem described.
TYPO3-CORE-SA-2020-012: XML External Entity in Dashboard Widget
Affected Software
Event History
Frequently Asked Questions
What is TYPO3-CORE-SA-2020-012: XML External Entity in Dashboard Widget?
TYPO3-CORE-SA-2020-012 is a vulnerability in TYPO3 where RSS widgets are susceptible to XML external entity processing, allowing attackers to potentially access sensitive information.
What is the severity of TYPO3-CORE-SA-2020-012?
The severity of TYPO3-CORE-SA-2020-012 is low, with a severity rating of 3.7 out of 10.
Which versions of TYPO3 are affected by TYPO3-CORE-SA-2020-012?
TYPO3 versions from 10.0.0 up to but excluding 10.4.10 are affected by the TYPO3-CORE-SA-2020-012 vulnerability.
How can an attacker exploit the TYPO3-CORE-SA-2020-012 vulnerability?
An attacker can exploit the TYPO3-CORE-SA-2020-012 vulnerability by manipulating XML external entities in RSS widgets to potentially access sensitive information.
Is there a fix available for TYPO3-CORE-SA-2020-012?
Yes, TYPO3 has released a fix for the TYPO3-CORE-SA-2020-012 vulnerability. It is recommended to update to TYPO3 version 10.4.10 or higher to address the issue.