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GHSA-7835-fcv3-g256high8.0

TYPO3 Scheduler Module vulnerable to Cross-Site Request Forgery

Impact

A vulnerability has been identified in the backend user interface functionality involving deep links. Specifically, this functionality is susceptible to Cross-Site Request Forgery (CSRF). Additionally, state-changing actions in downstream components incorrectly accepted submissions via HTTP GET and did not enforce the appropriate HTTP method.

Source excerpt · OSV
Applies when

Successful exploitation of this vulnerability requires the victim to have an active session on the backend user interface and to be deceived into interacting with a malicious URL targeting the backend, which can occur under the following conditions:

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

typo3/cms-scheduler Packagist
Affected rangeRecorded fix
From 11.0.0 before 11.5.42Ecosystem versions11.5.42

Version evidence: OSV · GHSA-7835-fcv3-g256

View original version evidence (51 explicit versions)

Original source description

Problem

A vulnerability has been identified in the backend user interface functionality involving deep links. Specifically, this functionality is susceptible to Cross-Site Request Forgery (CSRF). Additionally, state-changing actions in downstream components incorrectly accepted submissions via HTTP GET and did not enforce the appropriate HTTP method.

Successful exploitation of this vulnerability requires the victim to have an active session on the backend user interface and to be deceived into interacting with a malicious URL targeting the backend, which can occur under the following conditions:

  • the user opens a malicious link, such as one sent via email.
  • the user visits a compromised or manipulated website while the following settings are misconfigured:
    • security.backend.enforceReferrer feature is disabled,
    • BE/cookieSameSite configuration is set to lax or none

The vulnerability in the affected downstream component “Scheduler Module” allows attackers to trigger pre-defined command classes - which can lead to unauthorized import or export of data in the worst case.

Solution

Update to TYPO3 versions 11.5.42 ELTS that fixes the problem described.

Credits

Thanks to Gabriel Dimitrov who reported this issue and to TYPO3 core and security members Benjamin Franzke, Oliver Hader, Andreas Kienast, Torben Hansen, Elias Häußler who fixed the issue.

References