Cross-Site Scripting in Content Preview (CType menu)

中 5.4CVE-2021-21370 · BIT-typo3-2021-21370 · GHSA-x7hc-x7fm-f7qh · 23/03/2021 公開 · 17/06/2026 更新

要点

CVE-2021-21370 は typo3/cms, typo3/cms-backend, typo3/cms-core に影響する深刻度「中」 (CVSS 5.4) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.87%（全脆弱性の 58.9% より高い）。
対処：10.4.14, 11.1.1, 9.5.25, 7.6.51 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
typo3/cms Packagist	`≥ 10.0.0, < 10.4.14≥ 11.0.0, < 11.1.1≥ 9.0.0, < 9.5.25`	`10.4.1411.1.19.5.25`
typo3/cms-backend Packagist	`≥ 10.0.0, < 10.4.14≥ 11.0.0, < 11.1.1≥ 7.0.0, < 7.6.51≥ 8.0.0, < 8.7.40≥ 9.0.0, < 9.5.25`	`10.4.1411.1.17.6.518.7.409.5.25`
typo3/cms-core Packagist	`≥ 10.0.0, < 10.4.14≥ 11.0.0, < 11.1.1≥ 9.0.0, < 9.5.25`	`10.4.1411.1.19.5.25`
typo3 typo3	`≥ 10.0.0, < 10.4.14≥ 11.0.0, < 11.1.1≥ 7.0.0, < 7.6.51≥ 8.0.0, < 8.7.40≥ 9.0.0, < 9.5.25`	`10.4.1411.1.17.6.518.7.409.5.25`

概要

Problem

It has been discovered that content elements of type menu are vulnerable to cross-site scripting when their referenced items get previewed in the page module. A valid backend user account is needed to exploit this vulnerability.

Solution

Update to TYPO3 versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.

Credits

Thanks to TYPO3 contributor Oliver Bartsch who reported and fixed the issue.

References

TYPO3-CORE-SA-2021-008

NVD の説明

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 it has been discovered that content elements of type _menu_ are vulnerable to cross-site scripting when their referenced items get previewed in the page module. A valid backend user account is needed to exploit this vulnerability. This is fixed in versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.