CVE-2020-11064 Cross-Site Scripting in TYPO3 CMS

What is CVE-2020-11064?

CVE-2020-11064 is a medium-severity cross-site scripting vulnerability in Typo3 Typo3, published on 13 May 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.17 and greater than or equal to 10.0.0 and less than 10.4.2, it has been discovered that HTML placeholder attributes containing data of other database records are vulnerable to cross-site scripting. A valid backend user account is needed to exploit this vulnerability. This has been fixed in 9.5.17 and 10.4.2.

Weakness: CWE-79

Which versions are affected by CVE-2020-11064?

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

Products include Typo3 Typo3.

How do I fix CVE-2020-11064?

Upgrade typo3/cms to a fixed version for your release line: 10.4.2 or 9.5.17.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-11064 being exploited?

There is no known exploitation of CVE-2020-11064 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-typo3-2020-11064, GHSA-43gj-mj2w-wh46.