CVE-2021-21339
Cleartext storage of session identifier
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
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
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Cleartext storage of session identifier
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
- Record
CVE-2021-21339- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
EUVDEUVD-2021-0702
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
- Record
EUVD-2021-0702- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qx3w-4864-94ch
Cleartext storage of session identifier
Problem
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 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.
Credits
Thanks to TYPO3 security team member Oliver Hader who reported this issue and to TYPO3 core & security team members Benni Mack & Oliver Hader who fixed the issue.
References
- Record
GHSA-qx3w-4864-94ch- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
NVD
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
- Record
CVE-2021-21339- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
OSV
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
- Record
CVE-2021-21339- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-qx3w-4864-94ch
Cleartext storage of session identifier
Problem
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 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.
Credits
Thanks to TYPO3 security team member Oliver Hader who reported this issue and to TYPO3 core & security team members Benni Mack & Oliver Hader who fixed the issue.
References
- Record
GHSA-qx3w-4864-94ch- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
OSVBIT-typo3-2021-21339 No score
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
- Record
BIT-typo3-2021-21339- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
typo3/cms-corePackagist |
6.2.0 to 6.2.56 | 6.2.57 |
typo3/cms-corePackagist |
7.0.0 to 7.6.50 | 7.6.51 |
typo3/cms-corePackagist |
8.0.0 to 8.7.39 | 8.7.40 |
typo3/cms-corePackagist |
10.0.0 up to 10.4.14 | 10.4.14 |
typo3/cms-corePackagist |
11.0.0 up to 11.1.1 | 11.1.1 |
typo3/cms-corePackagist |
9.0.0 up to 9.5.25 | 9.5.25 |
typo3/cmsPackagist |
10.0.0 up to 10.4.14 | 10.4.14 |
typo3/cmsPackagist |
11.0.0 up to 11.1.1 | 11.1.1 |
typo3/cmsPackagist |
9.0.0 up to 9.5.25 | 9.5.25 |
typo3Bitnami |
6.2.0 up to 6.2.57, 7.0.0 up to 7.6.51, 8.0.0 up to 8.7.40, 9.0.0 up to 9.5.25, 10.0.0 up to 10.4.14, 11.0.0 up to 11.1.1 | 6.2.577.6.518.7.409.5.2510.4.1411.1.1 |
Show 9 moreShow less
| Package | Affected | Fixed |
|---|---|---|
typo3/cms-corePackagist |
6.2.0 up to 6.2.57 | 6.2.57 |
typo3/cms-corePackagist |
7.0.0 up to 7.6.51 | 7.6.51 |
typo3/cms-corePackagist |
8.0.0 up to 8.7.40, plus listed versions v8.7.10v8.7.11v8.7.12v8.7.13v8.7.14 Show 21 moreShow lessv8.7.15v8.7.16v8.7.17v8.7.18v8.7.19v8.7.20v8.7.21v8.7.22v8.7.23v8.7.24v8.7.25v8.7.26v8.7.27v8.7.28v8.7.29v8.7.30v8.7.31v8.7.32v8.7.7v8.7.8v8.7.9 |
8.7.40 |
typo3/cms-corePackagist |
10.0.0 up to 10.4.14, plus listed versions v10.0.0v10.1.0v10.2.0v10.2.1v10.2.2 Show 15 moreShow lessv10.3.0v10.4.0v10.4.1v10.4.10v10.4.11v10.4.12v10.4.13v10.4.2v10.4.3v10.4.4v10.4.5v10.4.6v10.4.7v10.4.8v10.4.9 |
10.4.14 |
typo3/cms-corePackagist |
11.0.0 up to 11.1.1, plus listed versions v11.0.0v11.1.0 |
11.1.1 |
typo3/cms-corePackagist |
9.0.0 up to 9.5.25, plus listed versions v9.0.0v9.1.0v9.2.0v9.2.1v9.3.0 Show 29 moreShow lessv9.3.1v9.3.2v9.3.3v9.4.0v9.5.0v9.5.1v9.5.10v9.5.11v9.5.12v9.5.13v9.5.14v9.5.15v9.5.16v9.5.17v9.5.18v9.5.19v9.5.2v9.5.20v9.5.21v9.5.22v9.5.23v9.5.24v9.5.3v9.5.4v9.5.5v9.5.6v9.5.7v9.5.8v9.5.9 |
9.5.25 |
typo3/cmsPackagist |
10.0.0 up to 10.4.14, plus listed versions v10.0.0v10.1.0v10.2.0v10.2.1v10.2.2 Show 15 moreShow lessv10.3.0v10.4.0v10.4.1v10.4.10v10.4.11v10.4.12v10.4.13v10.4.2v10.4.3v10.4.4v10.4.5v10.4.6v10.4.7v10.4.8v10.4.9 |
10.4.14 |
typo3/cmsPackagist |
11.0.0 up to 11.1.1, plus listed versions v11.0.0v11.1.0 |
11.1.1 |
typo3/cmsPackagist |
9.0.0 up to 9.5.25, plus listed versions v9.0.0v9.1.0v9.2.0v9.2.1v9.3.0 Show 29 moreShow lessv9.3.1v9.3.2v9.3.3v9.4.0v9.5.0v9.5.1v9.5.10v9.5.11v9.5.12v9.5.13v9.5.14v9.5.15v9.5.16v9.5.17v9.5.18v9.5.19v9.5.2v9.5.20v9.5.21v9.5.22v9.5.23v9.5.24v9.5.3v9.5.4v9.5.5v9.5.6v9.5.7v9.5.8v9.5.9 |
9.5.25 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-21339 is a medium vulnerability (CVSS 5.9) in Typo3, published March 23, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.92%, the 60th percentile. Fixed in typo3/cms-core 6.2.57.
References
packagist.org/packages/typo3/cms-core
github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-qx3w-4864-94ch
typo3.org/security/advisory/typo3-core-sa-2021-006
nvd.nist.gov/vuln/detail/CVE-2021-21339