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Vulnerability details: VCID-a49c-fqrj-nbb3
Vulnerability ID VCID-a49c-fqrj-nbb3
Aliases CVE-2020-26228
GHSA-954j-f27r-cj52
Summary Cleartext storage of session identifier User session identifiers were stored in cleartext - without processing of additional cryptographic hashing algorithms. This vulnerability cannot be exploited directly and occurs in combination with a chained attack - like for instance SQL injection in any other component of the system. ### Solution Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described. ### Credits Thanks to TYPO3 security team member Helmut Hummel who reported this issue and to TYPO3 core & security team members Benni Mack & Oliver Hader as well as TYPO3 contributor Markus Klein who fixed the issue.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-312 Cleartext Storage of Sensitive Information
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 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2020-26228
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2020-26228
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2020-26228
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2020-26228
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2020-26228
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2020-26228
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2020-26228
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2020-26228
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2020-26228
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-954j-f27r-cj52
cvssv3.1 8.1 https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-26228.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-26228.yaml
cvssv3.1 8.1 https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-26228.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-26228.yaml
cvssv3.1 8.1 https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-954j-f27r-cj52
cvssv3.1_qr HIGH https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-954j-f27r-cj52
generic_textual HIGH https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-954j-f27r-cj52
cvssv3.1 8.1 https://nvd.nist.gov/vuln/detail/CVE-2020-26228
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2020-26228
cvssv3.1 8.1 https://typo3.org/security/advisory/typo3-core-sa-2020-011
generic_textual HIGH https://typo3.org/security/advisory/typo3-core-sa-2020-011
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-26228
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-26228.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-26228.yaml
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-954j-f27r-cj52
https://nvd.nist.gov/vuln/detail/CVE-2020-26228
https://typo3.org/security/advisory/typo3-core-sa-2020-011
GHSA-954j-f27r-cj52 https://github.com/advisories/GHSA-954j-f27r-cj52
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-2020-26228.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-2020-26228.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/security/advisories/GHSA-954j-f27r-cj52
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-2020-26228
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-2020-011
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 0.39162
EPSS Score 0.00177
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:00:17.192062+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/11/GHSA-954j-f27r-cj52/GHSA-954j-f27r-cj52.json 38.0.0