{"cve":"CVE-2021-21365","nvd":{"published":"2021-04-27T20:15:08.713","modified":"2026-06-17T03:35:23.893","status":"Modified","description":"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/.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4},"cwes":["CWE-79"],"references":["https://github.com/benjaminkott/bootstrap_package/commit/de3a568fc311d6712d9339643e51e8627c80530b","https://github.com/benjaminkott/bootstrap_package/security/advisories/GHSA-p48w-vf3c-rqjx","https://typo3.org/security/advisory/typo3-ext-sa-2021-007","https://github.com/benjaminkott/bootstrap_package/commit/de3a568fc311d6712d9339643e51e8627c80530b","https://github.com/benjaminkott/bootstrap_package/security/advisories/GHSA-p48w-vf3c-rqjx"],"products":["typo3:typo3"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-21365","score":0.00941,"percentile":0.60967,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}