CVE-2021-32768 json
Cross-Site Scripting via Rich-Text Content
published 2021-08-10 5 y ago modified 2026-07-08 4 mo ago also BIT-typo3-2021-32768 , EUVD-2021-1673 , GHSA-c5c9-8c6m-727v
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist typo3/cms-core 7.6.53, 8.7.42, 9.5.29, 10.4.19, 11.3.2
- packagist typo3/cms 7.6.53, 8.7.42, 9.5.29, 10.4.19, 11.3.2
- bitnami typo3 7.6.52, 8.7.41, 9.5.28, 10.4.18, 11.3.1
Exploit prediction
0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | typo3/cms-core | >=7.0.0, <7.6.53 >=8.0.0, <8.7.42 >=10.0.0, <10.4.19 >=11.0.0, <11.3.2 >=9.0.0, <9.5.29 |
7.6.53 8.7.42 10.4.19 11.3.2 9.5.29 |
| packagist | typo3/cms | >=10.0.0, <10.4.19 >=11.0.0, <11.3.2 >=9.0.0, <9.5.29 >=8.0.0, <8.7.42 >=7.0.0, <7.6.53 |
10.4.19 11.3.2 9.5.29 8.7.42 7.6.53 |
| bitnami | typo3 | >=7.0.0, <7.6.52 >=8.0.0, <8.7.41 >=9.0.0, <9.5.28 >=10.0.0, <10.4.18 >=11.0.0, <11.3.1 |
7.6.52 8.7.41 9.5.28 10.4.18 11.3.1 |
Affected products
- TYPO3 TYPO3.CMS
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
typo3.org
/security/advisory/typo3-core-sa-2021-013
web, vendor-advisory
-
github.com
/TYPO3/TYPO3.CMS/security/advisories/GHSA-c5c9-8c6m-727v
web, third-party-advisory
-
github.com
/TYPO3/typo3/security/advisories/GHSA-c5c9-8c6m-727v
web
-
nvd.nist.gov
/vuln/detail/CVE-2021-32768
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-32768.yaml
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-32768.yaml
web
Sources
- CVE List CVE-2021-32768
- GitHub Advisory GHSA-c5c9-8c6m-727v
- NVD CVE-2021-32768
- OSV BIT-typo3-2021-32768
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