Threat landscape
high

Microsoft Office 365 (Moodle Plugin): Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

WID-SEC-2026-2400 · first 17.07.2026 · updated 17.07.2026 · CVSS 9,8

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What it is about

Die Microsoft Office Suite beinhaltet zahlreiche Büroanwendungen wie Textverarbeitung, Tabellenkalkulation, Datenbank und weitere Applikationen. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Microsoft Office 365 (Moodle Plugin) ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Benutzer zu imitieren und sich so erweiterte Berechtigungen, einschließlich Administratorzugriff, zu verschaffen.

Under what conditions?

Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.

What can happen in the worst case

An attacker could use the vulnerability to

  • Sicherheitsvorkehrungen zu umgehen
  • Benutzer zu imitieren
  • sich so erweiterte Berechtigungen
  • einschließlich Administratorzugriff und zu verschaffen

Am I affected?

Affected according to the BSI:

  • Microsoft Office 365 Moodle Plugin <4.5.6
  • Microsoft Office 365 Moodle Plugin <5.0.5
  • Microsoft Office 365 Moodle Plugin <5.1.1

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

What helps?

Update to at least:

  • Microsoft Office 365 Moodle Plugin 4.5.6
  • Microsoft Office 365 Moodle Plugin 5.0.5
  • Microsoft Office 365 Moodle Plugin 5.1.1

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-2026-54733

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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