CVE-2026-120332 PUBLISHED

Cross-Site Scripting in extension "Mail" (mail)

Assigner: TYPO3
Reserved: 01.11.2026 Published: 03.11.2026 Updated: 03.11.2026

The HTML content of mails and tracked URLs are rendered unescaped in the backend module. Backend users with access to the mail module can inject arbitrary HTML and JavaScript, which is executed in the context of other backend users viewing the mail preview or report.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS Score: 5.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	Low
Attack Complexity	Low	Integrity	None	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	TYPO3
Product	Extension "Mail"
Versions	Default: unaffected affected from 4.0.0 to 4.2.0 (excl.) affected from 0 to 3.12.5 (excl.)

Credits

Alexander Grein reporter
Alexander Grein remediation developer

References

https://typo3.org/security/advisory/typo3-ext-sa-2026-037

Problem Types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE