CVE-2026-6553: TYPO3 CMS Stores Cleartext Password in User Settings Module

CVE-2026-6553 · Severity: high · CVSS 7.5 · Published 2026-04-21

Changing backend users' passwords via the user settings module results in storing the cleartext password in the uc and user_settings fields of the be_users database table. This issue affects TYPO3 CMS version 14.2.0.

Technologies: typo3/cms-backend (Packagist), Typo3. Vendors: Packagist, Typo3.

Quick answers

Is CVE-2026-6553 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-6553 being exploited in the wild.
How severe is CVE-2026-6553?
High severity, with a CVSS score of 7.5, published 21 April 2026.
Which products and versions are affected?
typo3/cms-backend (Packagist) ECOSYSTEM:introduced=14.2.0,fixed=14.3.0.
Is there a fix for CVE-2026-6553?
Yes. typo3/cms-backend (Packagist): upgrade to 14.3.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-6553?
Check whether you run typo3/cms-backend (Packagist) or Typo3 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • typo3/cms-backend (Packagist): upgrade to 14.3.0 or later
    composer require typo3/cms-backend:^14.3.0

Affected products

  • typo3/cms-backend (Packagist) ECOSYSTEM:introduced=14.2.0,fixed=14.3.0
  • Typo3

Identifiers

  • CVE-2026-6553
  • GHSA-xvv6-p4wf-mvx7

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