CVE-2020-26227
Cross-Site Scripting in Fluid view helpers
Description
> ### 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)
How to fix CVE-2020-26227
To remediate CVE-2020-26227, upgrade the affected package to a fixed version below.
- —upgrade to 6.2.54 or later
- —upgrade to 10.4.10 or later
- —upgrade to 9.5.23 or later
Is CVE-2020-26227 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- >= 6.2.0, < 6.2.54, >= 7.6.0, < 7.6.48, >= 8.7.0, < 8.7.38, >= 9.0.0, < 9.5.23, >= 10.0.0, < 10.4.10
- >= 10.0.0, < 10.4.10
- >= 9.0.0, < 9.5.23
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |