CVE-2020-11067Network attack vector

Authenticated code execution via backend settings deserialization

Published May 13, 2020 · Updated Aug 4, 2024

Insecure deserialization in TYPO3 CMS 9.0.0 through 9.5.16 and 10.0.0 through 10.4.1 allows remote authenticated users to execute code. The backend's unpack_uc method passes the persisted $BE_USER->uc settings blob to PHP unserialize without disabling object instantiation. Exploitation requires a valid backend account and a usable third-party object gadget; successful chaining executes code in the web application context.

CVSS severity8.8
High
EPSS probability1.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure deserialization in TYPO3 CMS 9.0.0 through 9.5.16 and 10.0.0 through 10.4.1 allows remote authenticated users to execute code. The backend's unpack_uc method passes the persisted $BE_USER->uc settings blob to PHP unserialize without disabling object instantiation. Exploitation requires a valid backend account and a usable third-party object gadget; successful chaining executes code in the web application context.

The record

CVE
CVE-2020-11067
Published
May 13, 2020
Updated
Aug 4, 2024
Vendor
in2code GmbH
Product
TYPO3 CMS
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=>= 10.0.0, < 10.4.2
  2. Affected versionversion=>= 9.0.0, < 9.5.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

in2code GmbH · TYPO3 CMSversion=>= 10.0.0, < 10.4.2; version=>= 9.0.0, < 9.5.17

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:M/Au:S/C:P/I:P/A:P

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-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

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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