Vulnerability in TYPO3
CVE-2021-21339
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.009 (58.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- TYPO3
- TYPO3 Typo3.cms — versions >= 6.2.0, <= 6.2.56, >= 7.0.0, <= 7.6.50, >= 8.0.0, <= 8.7.39
Weakness classification (CWE)
Public proof-of-concept exploits
References
- packagist.org/packages/typo3/cms-core (Third Party Advisory, Release Notes)
- github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-qx3w-4864-94ch (Third Party Advisory)
- typo3.org/security/advisory/typo3-core-sa-2021-006 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-21339?
- CVE-2021-21339 is a medium-severity vulnerability in TYPO3, classified under Cleartext Storage of Sensitive Information. CVSS score: 5.9/10. Published 2021-03-23.
- How severe is CVE-2021-21339?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2021-21339 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.