CVE-2026-6553: Changing backend users' passwords via the user settings module results in storing the cleartext password in th

Routine

HIGH 7.5REMOTEDOWNGRADE

CVE-2026-6553 is a high-severity flaw (CVSS 7.5) affecting typo3. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-312
Published	2026-04-21
Last modified	2026-10-25

Publisher (CNA): TYPO3 · Vendor: typo3

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 10:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

typo3 typo3 DOWNGRADE

Affected: 14.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 14.2.0

1. Check installed version

apt-cache policy typo3 || rpm -q typo3 || typo3 --version

2. No fixed release: DOWNGRADE to a release before 14.2.0 (Debian / Ubuntu)

apt-cache madison typo3 sudo apt install typo3=<VERSION_BEFORE_14.2.0> sudo apt-mark hold typo3

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list typo3 sudo dnf downgrade typo3-<VERSION_BEFORE_14.2.0> sudo dnf versionlock add typo3

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-6553?

typo3: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-6553 being exploited?

CVE-2026-6553 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-6553 affect?

CVE-2026-6553 affects typo3. Severity is high (CVSS 7.5). 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.

How urgent is CVE-2026-6553?

Priority 33/100. High severity; Remotely exploitable, no login, no user action

Software pages

TYPO3 vulnerabilities

References

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