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TI-2026-84197 Aliases CVE-2026-120327GHSA-4gvg-mc6q-56hf

Open redirection in TYPO3 extension Mail

Priority LOW 30CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Spoofing
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-601.

Summary

The TYPO3 extension Mail contains an open redirect in its click tracking middleware. The middleware accepts an arbitrary target URL and redirects users to it, so an attacker can craft links on the website that send users to external sites. An unauthenticated remote attacker can use this to redirect a user who clicks a link, and user interaction is required. The flaw is classified as URL redirection to an untrusted site (CWE-601).

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00339 27th percentileScored 2026-11-07
Fix Fixed Extension "Mail" (TYPO3): 4.2.0, 3.12.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TYPO3Extension "Mail"4.0.0 to before 4.2.0; before 3.12.54.2.0, 3.12.5Patch availableCNA
  • Extension "Mail" VendorTYPO3 Affected 4.0.0 to before 4.2.0; before 3.12.5 Fixed in 4.2.0, 3.12.5 Patch available CNA

Remediation

Update TYPO3 extension Mail to version 4.2.0 if the installed version is 4.0.0 or later but before 4.2.0, and to version 3.12.5 if the installed version is before 3.12.5. CISA does not list this vulnerability in its Known Exploited Vulnerabilities catalog.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA Extension "Mail" (TYPO3) Fixed in 4.2.0, 3.12.5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    TYPO3 Extension "Mail" — typo3.org/security/advisory/typo3-ext-sa-2026-037

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2026-84198 Information disclosure in TYPO3 extension Mail exposes recipient dataPriority LOW 37
    • TI-2026-84200 TYPO3 Mail: backend users reach mails outside web mountsPriority LOW 31
    • TI-2026-84201 Server-Side Request Forgery in TYPO3 extension MailPriority LOW 24
    Show all 6 records → Advisory →

Timeline

  1. 2026-11-03 Threatist record created from CVE-2026-120327
  2. 2026-11-03 Alias added: GHSA-4gvg-mc6q-56hf
  3. 2026-11-03 CISA SSVC decision points changed

References

Advisory 1

  • 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-2025-30547 The sr_feuser_register extension through 12.4.8 for TYPO3 allows Remote Code Execution. CVSS 3.1CRITICAL 10.0
  • TI-2019-08867 The PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before… CVSS 3.1CRITICAL 9.8
  • TI-2008-04019 Unspecified vulnerability in the TYPO3 Secure Directory (kw_secdir) extension before… CVSS 2.0HIGH 10.0
See all 411 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences