CVE-2020-26227: Cross-Site Scripting in Fluid view helpers
First published: Tue Nov 17 2020(Updated: )
> ### Meta > * CVSS: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C` (5.7) > * CWE-79 ### Problem It has been discovered that system extension Fluid (`typo3/cms-fluid`) of the TYPO3 core is vulnerable to cross-site scripting passing user-controlled data as argument to Fluid view helpers. ``` <f:form ... fieldNamePrefix="{payload}" /> <f:be.labels.csh ... label="{payload}" /> <f:be.menus.actionMenu ... label="{payload}" /> ``` ### Solution Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described. ### Credits Thanks to TYPO3 security team member Oliver Hader who reported this issue and to TYPO3 security team members Helmut Hummel & Oliver Hader who fixed the issue. ### References * [TYPO3-CORE-SA-2020-010](https://typo3.org/security/advisory/typo3-core-sa-2020-010)
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/typo3/cms-core | >=10.0.0<10.4.10>=9.0.0<9.5.23>=8.7.0<8.7.38 | |
| composer/typo3/cms | >=10.0.0<10.4.10>=9.0.0<9.5.23>=8.7.0<8.7.38 | |
| Typo3 Typo3 | >=6.2.0<6.2.54 | |
| Typo3 Typo3 | >=7.6.0<7.6.48 | |
| Typo3 Typo3 | >=8.7.0<8.7.38 | |
| Typo3 Typo3 | >=9.0.0<9.5.23 | |
| Typo3 Typo3 | >=10.0.0<10.4.10 | |
| composer/typo3/cms | >=8.7.0<8.7.38 | 8.7.38 |
| composer/typo3/cms | >=9.0.0<9.5.23 | 9.5.23 |
| composer/typo3/cms | >=10.0.0<10.4.10 | 10.4.10 |
| composer/typo3/cms-core | >=8.7.0<8.7.38 | 8.7.38 |
| composer/typo3/cms-core | >=10.0.0<10.4.10 | 10.4.10 |
| composer/typo3/cms-core | >=9.0.0<9.5.23 | 9.5.23 |
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Reference Links
- https://typo3.org/security/advisory/typo3-core-sa-2020-010
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-vqqx-jw6p-q3rf
- https://nvd.nist.gov/vuln/detail/CVE-2020-26227
- https://packagist.org/packages/typo3/cms-core
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-26227.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-26227.yaml
- https://github.com/advisories/GHSA-vqqx-jw6p-q3rf (Advisory)
Frequently Asked Questions
What is TYPO3-CORE-SA-2020-010?
TYPO3-CORE-SA-2020-010 is a vulnerability in TYPO3 that allows for Cross-Site Scripting (XSS) attacks in Fluid view helpers.
What is the severity of CVE-2020-26227?
The severity of CVE-2020-26227 is moderate.
Which versions of TYPO3 are affected by TYPO3-CORE-SA-2020-010?
TYPO3 versions 8.7.0 to 8.7.38, 9.0.0 to 9.5.23, and 10.0.0 to 10.4.10 are affected by TYPO3-CORE-SA-2020-010.
How can I fix TYPO3-CORE-SA-2020-010?
To fix TYPO3-CORE-SA-2020-010, you should update TYPO3 to a version that includes the security patch provided by TYPO3.
Where can I find more information about TYPO3-CORE-SA-2020-010?
You can find more information about TYPO3-CORE-SA-2020-010 on the TYPO3 website at https://typo3.org/security/advisory/typo3-core-sa-2020-010.
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