CVE-2020-11055
Cross-Site Scripting in BookStack
描述
### Impact A user with permission to create comments could POST HTML directly to the system to be saved in a comment, which would then be executed/displayed to others users viewing the comment. Through this vulnerability custom JavaScript code could be injected and therefore ran on other user machines. This most impacts scenarios where not-trusted users are given permission to create comments. ### Patches The issue was addressed in BookStack v0.29.2. After upgrading, The command `php artisan bookstack:regenerate-comment-content` should be ran to remove any pre-existing dangerous content. ### Workarounds Comments can be disabled in the system settings to prevent them being shown to users. Alternatively, comment creation permissions can be altered as required to only those who are trusted but this will not address existing exploitation of this vulnerability. ### References * [BookStack Beta v0.29.2](https://github.com/BookStackApp/BookStack/releases/tag/v0.29.2) * JVN#41035278 * [BookStack Blog Post](https://bookstackapp.com/blog/beta-release-v0-29-2/) ### For more information If you have any questions or comments about this advisory: * Open an issue in [the BookStack GitHub repository](BookStackApp/BookStack/issues). * Ask on the [BookStack Discord chat](https://discord.gg/ztkBqR2). * Follow the [BookStack Security Advice](https://github.com/BookStackApp/BookStack#-security) to contact someone privately.
如何修補 CVE-2020-11055
要修補 CVE-2020-11055,請將受影響套件升級到下列已修補版本。
- —升級至 0.29.2 或更新版本
CVE-2020-11055 正在被利用嗎?
低 — EPSS 為 0.8%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- >= 0.18.0, < 0.29.2