CVE-2026-6553Network attack vector

Backend password disclosure via conflated settings persistence

Published Apr 21, 2026 · Updated Apr 21, 2026

Sensitive data exposure in TYPO3 CMS 14.2.0 allows attackers to obtain backend passwords after users change them in User Profile Settings. SetupModuleController merges password fields with interface-setting fields into one submission array and serializes the cleartext values into the uc and user_settings columns of be_users. The condition occurs only after a backend user changes credentials through the module; compromise requires subsequent access to the affected database fields.

CVSS severity7.3
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive data exposure in TYPO3 CMS 14.2.0 allows attackers to obtain backend passwords after users change them in User Profile Settings. SetupModuleController merges password fields with interface-setting fields into one submission array and serializes the cleartext values into the uc and user_settings columns of be_users. The condition occurs only after a backend user changes credentials through the module; compromise requires subsequent access to the affected database fields.

The record

CVE
CVE-2026-6553
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
in2code GmbH
Product
TYPO3 CMS
Classifications
CWE-312, T1555
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14.2.0 <14.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

in2code GmbH · TYPO3 CMSversion=14.2.0 <14.3.0

Published CVSS scores

7.3TYPO3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
T1555Credentials from Password Stores

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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