CVE-2021-21365 is a vulnerability in TYPO3
Published on April 27, 2021
Cross-Site Scripting in Content Rendering
Bootstrap Package is a theme for TYPO3. It has been discovered that rendering content in the website frontend is vulnerable to cross-site scripting. A valid backend user account is needed to exploit this vulnerability. Users of the extension, who have overwritten the affected templates with custom code must manually apply the security fix. Update to version 7.1.2, 8.0.8, 9.1.4, 10.0.10 or 11.0.3 of the Bootstrap Package that fix the problem described. Updated version are available from the TYPO3 extension manager, Packagist and at https://extensions.typo3.org/extension/download/bootstrap_package/.
Vulnerability Analysis
CVE-2021-21365 can be exploited with network access, requires user interaction and a small amount of user privileges. 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-2021-21365 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2021-21365
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Affected Versions
benjaminkott bootstrap_package:- Version >= 7.1.0, < 7.1.2 is affected.
- Version >= 8.0.0, < 8.0.8 is affected.
- Version >= 9.0.0, < 9.0.4 is affected.
- Version >= 9.1.0, < 9.1.3 is affected.
- Version >= 10.0.0, < 10.0.10 is affected.
- Version >= 11.0.0, < 11.0.3 is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2021-21365
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| composer | bk2k/bootstrap-package | >= 7.1.0, < 7.1.2 | 7.1.2 |
| composer | bk2k/bootstrap-package | >= 8.0.0, < 8.0.8 | 8.0.8 |
| composer | bk2k/bootstrap-package | >= 9.0.0, < 9.0.4 | 9.0.4 |
| composer | bk2k/bootstrap-package | >= 9.1.0, < 9.1.3 | 9.1.3 |
| composer | bk2k/bootstrap-package | >= 10.0.0, < 10.0.10 | 10.0.10 |
| composer | bk2k/bootstrap-package | >= 11.0.0, < 11.0.3 | 11.0.3 |
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.