CVE-2026-120327 PUBLISHED

Open Redirection in extension "Mail" (mail)

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

The click tracking middleware accepts an arbitrary target URL and redirects to it. Attackers can misuse links to the website to redirect users to external sites.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
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-601 URL Redirection to Untrusted Site ('Open Redirect') CWE