CVE-2021-21358: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in typo3/cms-form

CVE-2021-21358 · Severity: low · CVSS 3.1 · Published 2021-03-23

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in typo3/cms-form

Technologies: typo3/cms (Packagist), typo3/cms-core (Packagist), typo3/cms-form (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2021-21358 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-21358 being exploited in the wild.
How severe is CVE-2021-21358?
Low severity, with a CVSS score of 3.1, published 23 March 2021.
Which products and versions are affected?
typo3/cms (Packagist) ECOSYSTEM:introduced=10.0.0,fixed=10.4.14; typo3/cms-core (Packagist) ECOSYSTEM:introduced=10.0.0,fixed=10.4.14; typo3/cms-form (Packagist) ECOSYSTEM:introduced=10.2.0,fixed=10.4.14.
Is there a fix for CVE-2021-21358?
Yes. typo3/cms (Packagist): upgrade to 10.4.14 or later; typo3/cms-core (Packagist): upgrade to 10.4.14 or later; typo3/cms-form (Packagist): upgrade to 10.4.14 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-21358?
Check whether you run typo3/cms (Packagist), typo3/cms-core (Packagist) or typo3/cms-form (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • typo3/cms (Packagist): upgrade to 10.4.14 or later
    composer require typo3/cms:^10.4.14
  • typo3/cms-core (Packagist): upgrade to 10.4.14 or later
    composer require typo3/cms-core:^10.4.14
  • typo3/cms-form (Packagist): upgrade to 10.4.14 or later
    composer require typo3/cms-form:^10.4.14

Affected products

  • typo3/cms (Packagist) ECOSYSTEM:introduced=10.0.0,fixed=10.4.14
  • typo3/cms-core (Packagist) ECOSYSTEM:introduced=10.0.0,fixed=10.4.14
  • typo3/cms-form (Packagist) ECOSYSTEM:introduced=10.2.0,fixed=10.4.14

Identifiers

  • CVE-2021-21358
  • GHSA-x79j-wgqv-g8h2

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