CVE-2021-21339 Cleartext storage of session identifier

What is CVE-2021-21339?

CVE-2021-21339 is a medium-severity vulnerability in Typo3 Typo3, published on 23 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-312

Which versions are affected by CVE-2021-21339?

19 open source packages ship an affected version, including typo3/cms-core, typo3 and typo3/cms. It affects 1 product.

Products include Typo3 Typo3.

How do I fix CVE-2021-21339?

Upgrade typo3/cms-core to a fixed version for your release line: 10.4.14, 11.1.1, 6.2.57 or 7.6.51.

Is CVE-2021-21339 being exploited?

There is no known exploitation of CVE-2021-21339 in the wild and no public exploit code.

Other vulnerabilities in Typo3 Typo3

• CVE-2009-0258 Indexed Search Engine for TYPO3 Command Execution via Metacharacter Injection Critical 10.0
• CVE-2011-3583 Typo3 SQL injection due to faulty prepared statements Critical 9.8
• CVE-2011-4628 Typo3 Authentication Bypass Critical 9.8
• CVE-2023-24814 Persisted Cross-Site Scripting in Frontend Rendering in typo3 High 8.8
• CVE-2021-41113 Cross-Site-Request-Forgery in Backend URI Handling in Typo3 High 8.8

All Typo3 Typo3 vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-typo3-2021-21339, GHSA-qx3w-4864-94ch.