CVE-2021-21339
Cleartext storage of session identifier
Description
### 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 * [TYPO3-CORE-SA-2021-006](https://typo3.org/security/advisory/typo3-core-sa-2021-006)
How to fix CVE-2021-21339
To remediate CVE-2021-21339, upgrade the affected package to a fixed version below.
- —upgrade to 6.2.57 or later
- —upgrade to 10.4.14 or later
- —upgrade to 6.2.57 or later
Is CVE-2021-21339 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- >= 6.2.0, < 6.2.57, >= 7.0.0, < 7.6.51, >= 8.0.0, < 8.7.40, >= 9.0.0, < 9.5.25, >= 10.0.0, < 10.4.14, >= 11.0.0, < 11.1.1
- >= 10.0.0, < 10.4.14
- >= 6.2.0, < 6.2.57
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |