Home/CVE/TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions failing
CVE

CVE-2021-32768

TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions failing

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.

MEDIUM · CVSS 6.1 EPSS 0.00284
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

5
typo3>= 7.0.0 and <= 7.6.52
typo3>= 8.0.0 and <= 8.7.41
typo3>= 9.0.0 and <= 9.5.28
typo3>= 10.0.0 and <= 10.4.18
typo3>= 11.0.0 and <= 11.3.1
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Packagist typo3/cms MEDIUM fixed in 10.4.19
Packagist typo3/cms-core MEDIUM fixed in 7.6.53
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Aug 2021 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-c5c9-8c6m-727vThird Party Advisory
https://typo3.org/security/advisory/typo3-core-sa-2021-013Vendor Advisory
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