CVE-2020-26229

Description

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.

How to fix CVE-2020-26229

To remediate CVE-2020-26229, upgrade the affected package to a fixed version below.

• —upgrade to 10.4.10 or later
• —upgrade to 10.4.10 or later
• —upgrade to 10.4.10 or later

Is CVE-2020-26229 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• >= 10.0.0, < 10.4.10
• >= 10.0.0, < 10.4.10
• >= 10.0.0, < 10.4.10

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2020-26229
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-26229.yaml
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-26229.yaml
• WEBgithub.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-q9cp-mc96-m4w2