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TYPO3 Extensions: Mehrere Schwachstellen

WID-SEC-2026-0753 · first 17.03.2026 · updated 18.03.2026 · CVSS 7,5

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What it is about

TYPO3 ist ein freies Content-Management-System, basierend auf der Scriptsprache PHP und einer SQL-Datenbank. Über zahlreiche Extensions kann der Funktionsumfang der Core-Installation individuell erweitert werden. Ein lokaler, oder ein enfernter authentisierter Angreifer kann mehrere Schwachstellen in TYPO3 Extensions ausnutzen, um beliebigen Programmcode auszuführen, vertrauliche Informationen offenzulegen oder Sicherheitsmaßnahmen zu umgehen.

Under what conditions?

Only with access to the device or an account on it. Often the second step after a phishing email. Exploitable remotely according to the BSI.

What can happen in the worst case

An attacker could use the vulnerability to

  • beliebigen Programmcode auszuführen
  • vertrauliche Informationen offenzulegen oder Sicherheitsmaßnahmen zu umgehen

Am I affected?

Affected according to the BSI:

  • TYPO3 Extension Mailqueue <0.5.2
  • TYPO3 Extension Mailqueue <0.4.5
  • TYPO3 Extension Redirect Tab <4.0.5
  • TYPO3 Extension Redirect Tab <3.1.7
  • TYPO3 Extension Redirect Tab <2.1.2
  • TYPO3 Extension E-Mail MFA Provider

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

  • TYPO3 Extension Mailqueue 0.5.2
  • TYPO3 Extension Mailqueue 0.4.5
  • TYPO3 Extension Redirect Tab 4.0.5
  • TYPO3 Extension Redirect Tab 3.1.7
  • TYPO3 Extension Redirect Tab 2.1.2

Is the vulnerability already being exploited?

None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.

Information and sources

CVE: CVE-2026-1323, CVE-2026-4202, CVE-2026-4208

Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.

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