Read the docs
TI-2020-08941 Aliases CVE-2020-11067GHSA-2wj9-434x-9hvp

Deserialization of Untrusted Data in TYPO3 CMS

Priority MEDIUM 42CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

In TYPO3 CMS 9.0.0 through 9.5.16 and 10.0.0 through 10.4.1, it has been discovered that backend user settings (in $BE_USER->uc) are vulnerable to insecure deserialization. In combination with vulnerabilities of third party components, this can lead to remote code execution. A valid backend user account is needed to exploit this vulnerability. This has been fixed in 9.5.17 and 10.4.2.

Why it matters now

EPSS 0.0199 80th percentileScored 2026-11-07
Fix Fixed TYPO3 CMS (TYPO3): 9.5.17, 10.4.2typo3/cms-core (Packagist): 9.5.17, 10.4.2+1 more product

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
TYPO3TYPO3 CMS9.0.0 to before 9.5.17; 10.0.0 to before 10.4.29.5.17, 10.4.2Patch availableCNA
—typo3/cms-core (Packagist)9.0.0 to before 9.5.179.5.17Patch availableGHSA-2wj9-434x-9hvp
—typo3/cms-core (Packagist)10.0.0 to before 10.4.210.4.2Patch availableGHSA-2wj9-434x-9hvp
—typo3/cms (Packagist)10.0.0 to before 10.4.210.4.2Patch availableGHSA-2wj9-434x-9hvp
—typo3/cms (Packagist)9.0.0 to before 9.5.179.5.17Patch availableGHSA-2wj9-434x-9hvp
  • TYPO3 CMS VendorTYPO3 Affected 9.0.0 to before 9.5.17; 10.0.0 to before 10.4.2 Fixed in 9.5.17, 10.4.2 Patch available CNA
  • typo3/cms-core (Packagist) Vendor— Affected 9.0.0 to before 9.5.17 Fixed in 9.5.17 Patch available GHSA-2wj9-434x-9hvp
  • typo3/cms-core (Packagist) Vendor— Affected 10.0.0 to before 10.4.2 Fixed in 10.4.2 Patch available GHSA-2wj9-434x-9hvp
  • typo3/cms (Packagist) Vendor— Affected 10.0.0 to before 10.4.2 Fixed in 10.4.2 Patch available GHSA-2wj9-434x-9hvp
  • typo3/cms (Packagist) Vendor— Affected 9.0.0 to before 9.5.17 Fixed in 9.5.17 Patch available GHSA-2wj9-434x-9hvp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*9.0.0 – 9.5.16; 10.0.0 – 10.4.1VulnerableTYPO3
  • cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:* Versions 9.0.0 – 9.5.16; 10.0.0 – 10.4.1 Vulnerable ·TYPO3

Remediation

  • Fix · CNA TYPO3 CMS (TYPO3) Fixed in 9.5.17, 10.4.2
  • Fix · GHSA-2wj9-434x-9hvp typo3/cms-core (Packagist) Fixed in 9.5.17 Advisory →
  • Fix · GHSA-2wj9-434x-9hvp typo3/cms-core (Packagist) Fixed in 10.4.2 Advisory →
  • Fix · GHSA-2wj9-434x-9hvp typo3/cms (Packagist) Fixed in 10.4.2 Advisory →
  • Fix · GHSA-2wj9-434x-9hvp typo3/cms (Packagist) Fixed in 9.5.17 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-11067
  2. 2026-10-03 Alias added: GHSA-2wj9-434x-9hvp

References

Advisory 2

Other 3

  • 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