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Vulnerability details: VCID-5kzs-ex81-bbaj
Vulnerability ID VCID-5kzs-ex81-bbaj
Aliases CVE-2020-11067
GHSA-2wj9-434x-9hvp
Summary Insecure Deserialization in Backend User Settings in TYPO3 CMS It has been discovered that backend user settings (in $BE_USER->uc) are vulnerable to insecure deserialization. In combination with vulnerabilities of 3rd party components this can lead to remote code execution. A valid backend user account is needed to exploit this vulnerability. Update to TYPO3 versions 9.5.17 or 10.4.2 that fix the problem described. ### References * https://typo3.org/security/advisory/typo3-core-sa-2020-005
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-502 Deserialization of Untrusted Data
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.01181 https://api.first.org/data/v1/epss?cve=CVE-2020-11067
epss 0.01181 https://api.first.org/data/v1/epss?cve=CVE-2020-11067
epss 0.01181 https://api.first.org/data/v1/epss?cve=CVE-2020-11067
epss 0.01181 https://api.first.org/data/v1/epss?cve=CVE-2020-11067
epss 0.01181 https://api.first.org/data/v1/epss?cve=CVE-2020-11067
epss 0.01181 https://api.first.org/data/v1/epss?cve=CVE-2020-11067
epss 0.01181 https://api.first.org/data/v1/epss?cve=CVE-2020-11067
epss 0.01181 https://api.first.org/data/v1/epss?cve=CVE-2020-11067
epss 0.01181 https://api.first.org/data/v1/epss?cve=CVE-2020-11067
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-2wj9-434x-9hvp
cvssv3.1 8.8 https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11067.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11067.yaml
cvssv3.1 8.8 https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11067.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11067.yaml
cvssv3.1 8.8 https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2wj9-434x-9hvp
cvssv3.1_qr HIGH https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2wj9-434x-9hvp
generic_textual HIGH https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2wj9-434x-9hvp
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2020-11067
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2020-11067
cvssv3.1 8.8 https://typo3.org/security/advisory/typo3-core-sa-2020-005
generic_textual HIGH https://typo3.org/security/advisory/typo3-core-sa-2020-005
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-11067
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11067.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11067.yaml
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2wj9-434x-9hvp
https://nvd.nist.gov/vuln/detail/CVE-2020-11067
https://typo3.org/security/advisory/typo3-core-sa-2020-005
GHSA-2wj9-434x-9hvp https://github.com/advisories/GHSA-2wj9-434x-9hvp
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11067.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11067.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2wj9-434x-9hvp
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-11067
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://typo3.org/security/advisory/typo3-core-sa-2020-005
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.787
EPSS Score 0.01181
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:00:32.413347+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/05/GHSA-2wj9-434x-9hvp/GHSA-2wj9-434x-9hvp.json 38.0.0