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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | typo3/cms | >= 10.0.0, < 10.4.10, >= 9.0.0, < 9.5.23, >= 8.7.0, < 8.7.38 | 10.4.10, 9.5.23, 8.7.38 |
| Composer package | typo3/cms-core | >= 9.0.0, < 9.5.23, >= 10.0.0, < 10.4.10, >= 8.7.0, < 8.7.38 | 9.5.23, 10.4.10, 8.7.38 |
References
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-954j-f27r-cj52
- https://nvd.nist.gov/vuln/detail/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://typo3.org/security/advisory/typo3-core-sa-2020-011
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-312- Platform
- Composer
- Package
typo3/cms, typo3/cms-core- Disclosed
- 23.11.2020
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-954j-f27r-cj52 - CC BY 4.0
Vulnerability history: typo3/cms
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 188
- First → latest
- 09.2018 06.2024
- Without a fix
- 3
- Exploited in attacks
- 0
Severity breakdown
- Critical 6
- High 41
- Medium 128
- Low 13
Disclosures per year
- 2018: 2
- 2019: 0
- 2020: 13
- 2021: 15
- 2022: 85
- 2023: 1
- 2024: 72
- 2025: 0
- 2026: 0
-
Cleartext storage of session identifier this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.