CVE-2021-21358
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in typo3/cms-form
5.4
MEDIUM
CVSS 3.1
EPSS 0.87%
Description
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 10.4.14, 11.1.1 it has been discovered that the Form Designer backend module of the Form Framework is vulnerable to cross-site scripting. A valid backend user account with access to the form module is needed to exploit this vulnerability. This is fixed in versions 10.4.14, 11.1.1.
How to fix CVE-2021-21358
To remediate CVE-2021-21358, upgrade the affected package to a fixed version below.
- —upgrade to 10.4.14 or later
- —upgrade to 10.4.14 or later
- —upgrade to 10.4.14 or later
Is CVE-2021-21358 being exploited?
Low — EPSS is 0.9%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- >= 10.0.0, < 10.4.14
- >= 10.0.0, < 10.4.14
- >= 10.2.0, < 10.4.14
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C |