TYPO3 Mail up to 3.12.4/4.1.x input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k2.60-

Summaryinfo

A vulnerability categorized as critical has been discovered in TYPO3 Mail up to 3.12.4/4.1.x. This issue affects some unknown processing of the component Mail Module. Such manipulation leads to input validation. This vulnerability is traded as CVE-2026-120329. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in TYPO3 Mail up to 3.12.4/4.1.x and classified as critical. Affected by this issue is an unknown functionality of the component Mail Module. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Saving the configuration of the mail backend module writes submitted settings to the page TSconfig without restricting them to the configuration options of the module. Backend users with access to the mail module can write arbitrary page TSconfig.

The advisory is available at typo3.org. This vulnerability is handled as CVE-2026-120329 since 11/01/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available.

Upgrading to version 3.12.5 or 4.2.0 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mail 3.12.5/4.2.0

Timelineinfo

11/01/2026 CVE reserved
11/03/2026 +2 days Advisory disclosed
11/03/2026 +0 days VulDB entry created
11/03/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: typo3.org
Status: Confirmed

CNA: TYPO3
CVE: CVE-2026-120329 (🔒)

GCVE (CVE): GCVE-0-2026-120329
GCVE (VulDB): GCVE-100-430214

Entryinfo

Created: 11/03/2026 11:10
Changes: 11/03/2026 11:10 (67)
Complete: 🔍
Cache ID: 216::103

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