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Vulnerability details: VCID-phgh-sd4m-zbdx
Vulnerability ID VCID-phgh-sd4m-zbdx
Aliases CVE-2020-15099
GHSA-3x94-fv5h-5q2c
Summary Exposure of Sensitive Information to an Unauthorized Actor in TYPO3 CMS > ### Meta > * CVSS: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C` (7.5) > * CWE-20, CWE-200 ### Problem In case an attacker manages to generate a valid cryptographic message authentication code (HMAC-SHA1) - either by using a different existing vulnerability or in case the internal _encryptionKey_ was exposed - it is possible to retrieve arbitrary files of a TYPO3 installation. This includes the possibility to fetch _typo3conf/LocalConfiguration.php_ which again contains the _encryptionKey_ as well as credentials of the database management system being used. In case a database server is directly accessible either via internet or in a shared hosting network, this allows to completely retrieve, manipulate or delete database contents. This includes creating an administration user account - which can be used to trigger remote code execution by injecting custom extensions. ### Solution Update to TYPO3 versions 9.5.20 or 10.4.6 that fix the problem described. ### Credits Thanks to TYPO3 security team member Oliver Hader who reported and fixed the issue. ### References * [TYPO3-CORE-SA-2020-007](https://typo3.org/security/advisory/typo3-core-sa-2020-007)
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (5)
CWE-20 Improper Input Validation
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
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
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
System Score Found at
epss 0.01187 https://api.first.org/data/v1/epss?cve=CVE-2020-15099
epss 0.01187 https://api.first.org/data/v1/epss?cve=CVE-2020-15099
epss 0.01187 https://api.first.org/data/v1/epss?cve=CVE-2020-15099
epss 0.01187 https://api.first.org/data/v1/epss?cve=CVE-2020-15099
epss 0.01187 https://api.first.org/data/v1/epss?cve=CVE-2020-15099
epss 0.01187 https://api.first.org/data/v1/epss?cve=CVE-2020-15099
epss 0.01187 https://api.first.org/data/v1/epss?cve=CVE-2020-15099
epss 0.01187 https://api.first.org/data/v1/epss?cve=CVE-2020-15099
epss 0.01187 https://api.first.org/data/v1/epss?cve=CVE-2020-15099
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-3x94-fv5h-5q2c
cvssv3.1 8.1 https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-15099.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-15099.yaml
cvssv3.1 8.1 https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-15099.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-15099.yaml
cvssv3.1 8.1 https://github.com/TYPO3/TYPO3.CMS
generic_textual HIGH https://github.com/TYPO3/TYPO3.CMS
cvssv3.1 8.1 https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3x94-fv5h-5q2c
cvssv3.1_qr HIGH https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3x94-fv5h-5q2c
generic_textual HIGH https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3x94-fv5h-5q2c
cvssv3.1 8.1 https://nvd.nist.gov/vuln/detail/CVE-2020-15099
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2020-15099
cvssv3.1 8.1 https://typo3.org/security/advisory/typo3-core-sa-2020-007
generic_textual HIGH https://typo3.org/security/advisory/typo3-core-sa-2020-007
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-15099
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-15099.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-15099.yaml
https://github.com/TYPO3/TYPO3.CMS
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3x94-fv5h-5q2c
https://nvd.nist.gov/vuln/detail/CVE-2020-15099
https://typo3.org/security/advisory/typo3-core-sa-2020-007
GHSA-3x94-fv5h-5q2c https://github.com/advisories/GHSA-3x94-fv5h-5q2c
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-15099.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:U/C:H/I:H/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-15099.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:U/C:H/I:H/A:H Found at https://github.com/TYPO3/TYPO3.CMS
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:U/C:H/I:H/A:H Found at https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3x94-fv5h-5q2c
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:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-15099
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:U/C:H/I:H/A:H Found at https://typo3.org/security/advisory/typo3-core-sa-2020-007
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 0.7875
EPSS Score 0.01187
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:00:21.356005+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/07/GHSA-3x94-fv5h-5q2c/GHSA-3x94-fv5h-5q2c.json 38.0.0