Medium severity · published Aug 10, 2021
CVE-2021-32768
TYPO3 is an open source PHP based web content management system released under the GNU GPL
6.1
CVSS
0.7%
EPSS
No
On KEV
Description
TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions failing to properly parse, sanitize and encode malicious rich-text content, the content rendering process in the website frontend 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. Update to TYPO3 versions 7.6.53 ELTS, 8.7.42 ELTS, 9.5.29, 10.4.19, 11.3.2 that fix the problem described.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TY
Typo3 · Typo3
7.0.0 through 7.6.52; 8.0.0 through 8.7.41; 9.0.0 through 9.5.28; 10.0.0 through 10.4.18; 11.0.0 through 11.3.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32768
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-32768
Third Party Advisory
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-c5c9-8c6m-727v
Vendor Advisory
https://typo3.org/security/advisory/typo3-core-sa-2021-013
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