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CVE-2020-26228

Cleartext storage of session identifier

8.1 HighFix available

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 user session identifiers were stored in cleartext - without processing with 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. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.68%Unchanged since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 8.1

Cleartext storage of session identifier

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 user session identifiers were stored in cleartext - without processing with 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. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.

Record
CVE-2020-26228
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-312
Updated
2026-11-02
EUVDEUVD-2020-1453 8.1

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 user session identifiers were stored in cleartext - without processing with 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. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.

Record
EUVD-2020-1453
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-954j-f27r-cj52 8.1

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.

Record
GHSA-954j-f27r-cj52
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-312
Updated
2026-11-02
NVD 8.1

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 user session identifiers were stored in cleartext - without processing with 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. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.

Record
CVE-2020-26228
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness
CWE-312
Updated
2026-11-02
OSV 7.5

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 user session identifiers were stored in cleartext - without processing with 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. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.

Record
CVE-2020-26228
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVGHSA-954j-f27r-cj52 8.1

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.

Record
GHSA-954j-f27r-cj52
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-312
Updated
2026-11-02
OSVBIT-typo3-2020-26228 No score

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 user session identifiers were stored in cleartext - without processing with 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. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.

Record
BIT-typo3-2020-26228
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
typo3/cms-core
Packagist
9.0.0 up to 9.5.23
9.5.23
typo3/cms-core
Packagist
10.0.0 up to 10.4.10
10.4.10
typo3/cms-core
Packagist
8.7.0 up to 8.7.38
8.7.38
typo3/cms
Packagist
10.0.0 up to 10.4.10
10.4.10
typo3/cms
Packagist
9.0.0 up to 9.5.23
9.5.23
typo3/cms
Packagist
8.7.0 up to 8.7.38
8.7.38
typo3
Bitnami
9.0.0 up to 9.5.23, 10.0.0 up to 10.4.10
9.5.2310.4.10
typo3/cms-core
Packagist
9.0.0 up to 9.5.23, plus listed versions
v9.0.0v9.1.0v9.2.0v9.2.1v9.3.0
Show 27 moreShow less
v9.3.1v9.3.2v9.3.3v9.4.0v9.5.0v9.5.1v9.5.10v9.5.11v9.5.12v9.5.13v9.5.14v9.5.15v9.5.16v9.5.17v9.5.18v9.5.19v9.5.2v9.5.20v9.5.21v9.5.22v9.5.3v9.5.4v9.5.5v9.5.6v9.5.7v9.5.8v9.5.9
9.5.23
typo3/cms-core
Packagist
10.0.0 up to 10.4.10, plus listed versions
v10.0.0v10.1.0v10.2.0v10.2.1v10.2.2
Show 11 moreShow less
v10.3.0v10.4.0v10.4.1v10.4.2v10.4.3v10.4.4v10.4.5v10.4.6v10.4.7v10.4.8v10.4.9
10.4.10
typo3/cms-core
Packagist
8.7.0 up to 8.7.38, plus listed versions
v8.7.10v8.7.11v8.7.12v8.7.13v8.7.14
Show 21 moreShow less
v8.7.15v8.7.16v8.7.17v8.7.18v8.7.19v8.7.20v8.7.21v8.7.22v8.7.23v8.7.24v8.7.25v8.7.26v8.7.27v8.7.28v8.7.29v8.7.30v8.7.31v8.7.32v8.7.7v8.7.8v8.7.9
8.7.38
typo3/cms
Packagist
10.0.0 up to 10.4.10, plus listed versions
v10.0.0v10.1.0v10.2.0v10.2.1v10.2.2
Show 11 moreShow less
v10.3.0v10.4.0v10.4.1v10.4.2v10.4.3v10.4.4v10.4.5v10.4.6v10.4.7v10.4.8v10.4.9
10.4.10
typo3/cms
Packagist
9.0.0 up to 9.5.23, plus listed versions
v9.0.0v9.1.0v9.2.0v9.2.1v9.3.0
Show 27 moreShow less
v9.3.1v9.3.2v9.3.3v9.4.0v9.5.0v9.5.1v9.5.10v9.5.11v9.5.12v9.5.13v9.5.14v9.5.15v9.5.16v9.5.17v9.5.18v9.5.19v9.5.2v9.5.20v9.5.21v9.5.22v9.5.3v9.5.4v9.5.5v9.5.6v9.5.7v9.5.8v9.5.9
9.5.23
typo3/cms
Packagist
8.7.0 up to 8.7.38, plus listed versions
8.7.18.7.2v8.7.10v8.7.11v8.7.12
Show 27 moreShow less
v8.7.13v8.7.14v8.7.15v8.7.16v8.7.17v8.7.18v8.7.19v8.7.20v8.7.21v8.7.22v8.7.23v8.7.24v8.7.25v8.7.26v8.7.27v8.7.28v8.7.29v8.7.3v8.7.30v8.7.31v8.7.32v8.7.4v8.7.5v8.7.6v8.7.7v8.7.8v8.7.9
8.7.38

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-26228 is a high vulnerability (CVSS 8.1) in Typo3, published November 23, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.68%, the 52nd percentile. Fixed in typo3/cms-core 9.5.23.

References

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