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Vulnerability details: VCID-nz3y-ncy4-7kdm
Vulnerability ID VCID-nz3y-ncy4-7kdm
Aliases CVE-2020-11066
GHSA-2rxh-h6h9-qrqc
Summary Class destructors causing side-effects when being unserialized in TYPO3 CMS Calling unserialize() on malicious user-submitted content can result in the following scenarios: - trigger deletion of arbitrary directory in file system (if writable for web server) - trigger message submission via email using identity of web site (mail relay) Another insecure deserialization vulnerability is required to actually exploit mentioned aspects. 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-2020-004
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
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 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2020-11066
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-2rxh-h6h9-qrqc
cvssv3.1 8.7 https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11066.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11066.yaml
cvssv3.1 8.7 https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11066.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11066.yaml
cvssv3.1 8.7 https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2rxh-h6h9-qrqc
cvssv3.1_qr HIGH https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2rxh-h6h9-qrqc
generic_textual HIGH https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2rxh-h6h9-qrqc
cvssv2 6.4 https://nvd.nist.gov/vuln/detail/CVE-2020-11066
cvssv3.1 10.0 https://nvd.nist.gov/vuln/detail/CVE-2020-11066
cvssv3.1 8.7 https://nvd.nist.gov/vuln/detail/CVE-2020-11066
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2020-11066
cvssv3.1 8.7 https://typo3.org/security/advisory/typo3-core-sa-2020-004
generic_textual HIGH https://typo3.org/security/advisory/typo3-core-sa-2020-004
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-11066
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11066.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11066.yaml
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2rxh-h6h9-qrqc
https://nvd.nist.gov/vuln/detail/CVE-2020-11066
https://typo3.org/security/advisory/typo3-core-sa-2020-004
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
GHSA-2rxh-h6h9-qrqc https://github.com/advisories/GHSA-2rxh-h6h9-qrqc
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11066.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:H/PR:N/UI:N/S:C/C:N/I:H/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11066.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:H/PR:N/UI:N/S:C/C:N/I:H/A:H Found at https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2rxh-h6h9-qrqc
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: AV:N/AC:L/Au:N/C:N/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2020-11066
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-11066
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:H/PR:N/UI:N/S:C/C:N/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-11066
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:H/PR:N/UI:N/S:C/C:N/I:H/A:H Found at https://typo3.org/security/advisory/typo3-core-sa-2020-004
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 0.66184
EPSS Score 0.00528
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:17:34.968223+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/05/GHSA-2rxh-h6h9-qrqc/GHSA-2rxh-h6h9-qrqc.json 36.1.3