TYPO3 up to 14.3.6 Backend Localization Wizard improper authorization

Summaryinfo

A vulnerability described as problematic has been identified in TYPO3 up to 10.4.59/11.5.53/12.4.48/13.4.34/14.3.6. The affected element is an unknown function of the component Backend Localization Wizard. The manipulation results in improper authorization. This vulnerability was named CVE-2026-77132. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in TYPO3 up to 10.4.59/11.5.53/12.4.48/13.4.34/14.3.6. It has been classified as problematic. Affected is an unknown code block of the component Backend Localization Wizard. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality. CVE summarizes:

It has been discovered that several AJAX routes used for the backend localization wizard failed to perform authorization checks. This allowed authenticated, low-privileged backend users to access information about records and content elements that fall outside of their permitted range. Exploiting this vulnerability requires a low-privileged backend user account. This issue affects TYPO3 CMS versions 10.0.0-10.4.59, 11.0.0-11.5.53, 12.0.0-12.4.48, 13.0.0-13.4.34 and 14.0.0-14.3.6.

The advisory is shared for download at news.typo3.com. This vulnerability is traded as CVE-2026-77132 since 08/20/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/08/2026). The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading to version 10.4.60, 11.5.54, 12.4.49, 13.4.35 or 14.3.7 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Name

• TYPO3

Version

• 10.4.0
• 10.4.1
• 10.4.2
• 10.4.3
• 10.4.4
• 10.4.5
• 10.4.6
• 10.4.7
• 10.4.8
• 10.4.9
• 10.4.10
• 10.4.11
• 10.4.12
• 10.4.13
• 10.4.14
• 10.4.15
• 10.4.16
• 10.4.17
• 10.4.18
• 10.4.19
• 10.4.20
• 10.4.21
• 10.4.22
• 10.4.23
• 10.4.24
• 10.4.25
• 10.4.26
• 10.4.27
• 10.4.28
• 10.4.29
• 10.4.30
• 10.4.31
• 10.4.32
• 10.4.33
• 10.4.34
• 10.4.35
• 10.4.36
• 10.4.37
• 10.4.38
• 10.4.39
• 10.4.40
• 10.4.41
• 10.4.42
• 10.4.43
• 10.4.44
• 10.4.45
• 10.4.46
• 10.4.47
• 10.4.48
• 10.4.49
• 10.4.50
• 10.4.51
• 10.4.52
• 10.4.53
• 10.4.54
• 10.4.55
• 10.4.56
• 10.4.57
• 10.4.58
• 10.4.59
• 11.5.0
• 11.5.1
• 11.5.2
• 11.5.3
• 11.5.4
• 11.5.5
• 11.5.6
• 11.5.7
• 11.5.8
• 11.5.9
• 11.5.10
• 11.5.11
• 11.5.12
• 11.5.13
• 11.5.14
• 11.5.15
• 11.5.16
• 11.5.17
• 11.5.18
• 11.5.19
• 11.5.20
• 11.5.21
• 11.5.22
• 11.5.23
• 11.5.24
• 11.5.25
• 11.5.26
• 11.5.27
• 11.5.28
• 11.5.29
• 11.5.30
• 11.5.31
• 11.5.32
• 11.5.33
• 11.5.34
• 11.5.35
• 11.5.36
• 11.5.37
• 11.5.38
• 11.5.39
• 11.5.40
• 11.5.41
• 11.5.42
• 11.5.43
• 11.5.44
• 11.5.45
• 11.5.46
• 11.5.47
• 11.5.48
• 11.5.49
• 11.5.50
• 11.5.51
• 11.5.52
• 11.5.53
• 12.4.0
• 12.4.1
• 12.4.2
• 12.4.3
• 12.4.4
• 12.4.5
• 12.4.6
• 12.4.7
• 12.4.8
• 12.4.9
• 12.4.10
• 12.4.11
• 12.4.12
• 12.4.13
• 12.4.14
• 12.4.15
• 12.4.16
• 12.4.17
• 12.4.18
• 12.4.19
• 12.4.20
• 12.4.21
• 12.4.22
• 12.4.23
• 12.4.24
• 12.4.25
• 12.4.26
• 12.4.27
• 12.4.28
• 12.4.29
• 12.4.30
• 12.4.31
• 12.4.32
• 12.4.33
• 12.4.34
• 12.4.35
• 12.4.36
• 12.4.37
• 12.4.38
• 12.4.39
• 12.4.40
• 12.4.41
• 12.4.42
• 12.4.43
• 12.4.44
• 12.4.45
• 12.4.46
• 12.4.47
• 12.4.48
• 13.4.0
• 13.4.1
• 13.4.2
• 13.4.3
• 13.4.4
• 13.4.5
• 13.4.6
• 13.4.7
• 13.4.8
• 13.4.9
• 13.4.10
• 13.4.11
• 13.4.12
• 13.4.13
• 13.4.14
• 13.4.15
• 13.4.16
• 13.4.17
• 13.4.18
• 13.4.19
• 13.4.20
• 13.4.21
• 13.4.22
• 13.4.23
• 13.4.24
• 13.4.25
• 13.4.26
• 13.4.27
• 13.4.28
• 13.4.29
• 13.4.30
• 13.4.31
• 13.4.32
• 13.4.33
• 13.4.34
• 14.3.0
• 14.3.1
• 14.3.2
• 14.3.3
• 14.3.4
• 14.3.5
• 14.3.6

License

• open-source

Website

• Product: https://typo3.org/

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