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TI-2021-04440 Aliases CVE-2021-21340GHSA-fjh3-g8gq-9q92

Cross-Site Scripting in Content Preview

Priority LOW 26CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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 database fields used as _descriptionColumn_ are vulnerable to cross-site scripting when their content gets previewed. A valid backend user account is needed to exploit this vulnerability. This is fixed in versions 10.4.14, 11.1.1 .

Why it matters now

EPSS 0.00872 59th percentileScored 2026-11-07
Fix Fixed typo3/cms-backend (Packagist): 10.4.14, 11.1.1typo3/cms-core (Packagist): 10.4.14, 11.1.1+1 more product

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
TYPO3TYPO3.CMS10.0.0 – 10.4.13; 11.0.0 – 11.1.0—No fix listedCNA
—typo3/cms-backend (Packagist)10.0.0 to before 10.4.1410.4.14Patch availableGHSA-fjh3-g8gq-9q92
—typo3/cms-backend (Packagist)11.0.0 to before 11.1.111.1.1Patch availableGHSA-fjh3-g8gq-9q92
—typo3/cms-core (Packagist)10.0.0 to before 10.4.1410.4.14Patch availableGHSA-fjh3-g8gq-9q92
—typo3/cms-core (Packagist)11.0.0 to before 11.1.111.1.1Patch availableGHSA-fjh3-g8gq-9q92
—typo3/cms (Packagist)10.0.0 to before 10.4.1410.4.14Patch availableGHSA-fjh3-g8gq-9q92
—typo3/cms (Packagist)11.0.0 to before 11.1.111.1.1Patch availableGHSA-fjh3-g8gq-9q92
  • TYPO3.CMS VendorTYPO3 Affected 10.0.0 – 10.4.13; 11.0.0 – 11.1.0 Fixed in — No fix listed CNA
  • typo3/cms-backend (Packagist) Vendor— Affected 10.0.0 to before 10.4.14 Fixed in 10.4.14 Patch available GHSA-fjh3-g8gq-9q92
  • typo3/cms-backend (Packagist) Vendor— Affected 11.0.0 to before 11.1.1 Fixed in 11.1.1 Patch available GHSA-fjh3-g8gq-9q92
  • typo3/cms-core (Packagist) Vendor— Affected 10.0.0 to before 10.4.14 Fixed in 10.4.14 Patch available GHSA-fjh3-g8gq-9q92
  • typo3/cms-core (Packagist) Vendor— Affected 11.0.0 to before 11.1.1 Fixed in 11.1.1 Patch available GHSA-fjh3-g8gq-9q92
  • typo3/cms (Packagist) Vendor— Affected 10.0.0 to before 10.4.14 Fixed in 10.4.14 Patch available GHSA-fjh3-g8gq-9q92
  • typo3/cms (Packagist) Vendor— Affected 11.0.0 to before 11.1.1 Fixed in 11.1.1 Patch available GHSA-fjh3-g8gq-9q92

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*10.0.0 to before 10.4.14; 11.0.0 to before 11.1.1VulnerableTYPO3
  • cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:* Versions 10.0.0 to before 10.4.14; 11.0.0 to before 11.1.1 Vulnerable ·TYPO3

Remediation

  • Fix · GHSA-fjh3-g8gq-9q92 typo3/cms-backend (Packagist) Fixed in 10.4.14 Advisory →
  • Fix · GHSA-fjh3-g8gq-9q92 typo3/cms-backend (Packagist) Fixed in 11.1.1 Advisory →
  • Fix · GHSA-fjh3-g8gq-9q92 typo3/cms-core (Packagist) Fixed in 10.4.14 Advisory →
  • Fix · GHSA-fjh3-g8gq-9q92 typo3/cms-core (Packagist) Fixed in 11.1.1 Advisory →
  • Fix · GHSA-fjh3-g8gq-9q92 typo3/cms (Packagist) Fixed in 10.4.14 Advisory →
  • Fix · GHSA-fjh3-g8gq-9q92 typo3/cms (Packagist) Fixed in 11.1.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21340
  2. 2026-10-03 Alias added: GHSA-fjh3-g8gq-9q92

References

Advisory 4

Other 2

  • TI-2023-10314 Persisted Cross-Site Scripting in Frontend Rendering in typo3 CVSS 3.1HIGH 8.8
  • TI-2010-03538 The jumpUrl (aka access tracking) implementation in tslib/class.tslib_fe.php in TYPO3… CVSS 2.0HIGH 7.1
  • TI-2009-00775 The jumpUrl mechanism in class.tslib_fe.php in TYPO3 3.3.x through 3.8.x, 4.0 before… CVSS 2.0MEDIUM 5.0
  • TI-2009-00241 The Indexed Search Engine (indexed_search) system extension in TYPO3 4.0.0 through 4.0.9… CVSS 2.0HIGH 10.0
  • TI-2020-08940 Improperly Controlled Modification of Dynamically-Determined Object Attributes in TYPO3 CMS CVSS 3.1CRITICAL 10.0
  • TI-2011-03994 Improper authentication in TYPO3 CVSS 3.1CRITICAL 9.8
See all 217 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences