CVE-2023-47127Network attack vector

Cross-site session access via unscoped cookie JWT

Published Nov 14, 2023 · Updated Aug 29, 2024

Authentication bypass in TYPO3 CMS allows remote authenticated users to reuse a valid frontend session cookie across sites. UserSession::resolveIdentifierFromJwt validates the JWT without binding its scope to the request domain or path, so another site accepts the token. Exploitation requires a valid frontend account and at least two sites in one installation; access remains bounded by that account's frontend permissions.

CVSS severity4.2
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in TYPO3 CMS allows remote authenticated users to reuse a valid frontend session cookie across sites. UserSession::resolveIdentifierFromJwt validates the JWT without binding its scope to the request domain or path, so another site accepts the token. Exploitation requires a valid frontend account and at least two sites in one installation; access remains bounded by that account's frontend permissions.

The record

CVE
CVE-2023-47127
Published
Nov 14, 2023
Updated
Aug 29, 2024
Vendor
in2code GmbH
Product
TYPO3 CMS
Classifications
CWE-302, CWE-287, CWE-1390, T1550.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 29, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 10.0.0, < 10.4.41
  2. Affected versionversion=>= 11.0.0, < 11.5.33
  3. Affected versionversion=>= 12.0.0, < 12.4.8
  4. Affected versionversion=>= 8.0.0, < 8.7.55
  5. Affected versionversion=>= 9.0.0, < 9.5.44

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

in2code GmbH · TYPO3 CMSversion=>= 10.0.0, < 10.4.41; version=>= 11.0.0, < 11.5.33; version=>= 12.0.0, < 12.4.8; version=>= 8.0.0, < 8.7.55; version=>= 9.0.0, < 9.5.44

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
4.2GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
4.0TYPO3 Security TeamCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N/E:X/RL:O/RC:C

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-302Authentication Bypass by Assumed-Immutable Data
CWE-287Improper Authentication
CWE-1390Weak Authentication
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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