CVE-2021-32768 is a vulnerability in TYPO3
Published on August 10, 2021
Cross-Site Scripting via Rich-Text Content
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.
Vulnerability Analysis
CVE-2021-32768 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2021-32768 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2021-32768
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Affected Versions
TYPO3.CMS:- Version >= 7.0.0, < 7.6.53 is affected.
- Version >= 8.0.0, < 8.7.42 is affected.
- Version >= 9.0.0, < 9.5.29 is affected.
- Version >= 10.0.0, < 10.4.19 is affected.
- Version >= 11.0.0, < 11.3.2 is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2021-32768
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| composer | typo3/cms-core | >= 7.0.0, <= 7.6.52 | 7.6.53 |
| composer | typo3/cms-core | >= 8.0.0, <= 8.7.41 | 8.7.42 |
| composer | typo3/cms-core | >= 9.0.0, <= 9.5.28 | 9.5.29 |
| composer | typo3/cms-core | >= 10.0.0, <= 10.4.18 | 10.4.19 |
| composer | typo3/cms-core | >= 11.0.0, <= 11.3.1 | 11.3.2 |
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.