TYPO3 up to 10.4.9 RSS Widget xml external entity reference

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

A vulnerability has been found in TYPO3 up to 10.4.9 (Content Management System) and classified as critical. Affected by this vulnerability is an unknown code block of the component RSS Widget. The manipulation with an unknown input leads to a xml external entity vulnerability. The CWE definition for the vulnerability is CWE-611. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was shared 11/24/2020. The advisory is shared at github.com. This vulnerability is known as CVE-2020-26229 since 10/01/2020. The exploitation appears to be easy. The attack can be launched remotely. The requirement for exploitation is a single authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/10/2020).

Upgrading to version 10.4.10 eliminates this vulnerability.

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CPE 2.3infoedit

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CVSSv3infoedit

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2infoedit

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

NVD Base Score: 🔒

Exploitinginfoedit

Class: XML External Entity
CWE: CWE-611
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Economy: 🔍
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Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: TYPO3 10.4.10

Timelineinfoedit

10/01/2020 CVE assigned
11/24/2020 +54 days Advisory disclosed
11/24/2020 +0 days VulDB entry created
12/10/2020 +16 days VulDB last update

Sourcesinfoedit

Product: https://typo3.org/

Advisory: github.com
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2020-26229 (🔒)

Entryinfoedit

Created: 11/24/2020 08:07 AM
Updated: 12/10/2020 07:53 AM
Changes: (8) vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai source_cve_cna vulnerability_cvss2_nvd_basescore
Complete: 🔍

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