CVE-2021-32768: Cross-site Scripting

August 10, 2021 (updated August 19, 2021)

TYPO3 is vulnerable to cross-site scripting. Corresponding rendering instructions via TypoScript functionality HTMLparser does not consider all potentially malicious HTML tag & attribute combinations per default. In default scenarios, a valid backend user account is needed to exploit this vulnerability. In case custom plugins used in the website frontend accept and reflect rich-text content submitted by users, no authentication is required.

References

nvd.nist.gov/vuln/detail/CVE-2021-32768
typo3.org/security/advisory/typo3-core-sa-2021-013

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