CVE-2020-15249
Stored XSS by authenticated backend user with access to upload files
描述
### Impact Backend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers, this means that they could theoretically upload Javascript that would be executed on a path under the website's domain (i.e. /storage/app/media/evil.svg), but they would have to convince their target to visit that location directly in the target's browser as the backend does not display SVGs inline anywhere, SVGs are only displayed as image resources in the backend and are thus unable to be executed. ### Patches Issue has been patched in Build 469 (v1.0.469) & v1.1.0. ### Workarounds Apply https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4 to your installation manually if unable to upgrade to Build 469 or v1.1.0. ### References Reported by [Hoan Hoang](https://github.com/hoanhp) ### For more information If you have any questions or comments about this advisory: * Email us at [hello@octobercms.com](mailto:hello@octobercms.com) ### Threat assessment: <img width="1107" alt="Screen Shot 2020-10-10 at 1 47 49 PM" src="https://user-images.githubusercontent.com/7253840/95663787-378f2b80-0aff-11eb-8dfc-b97d162939da.png">
如何修補 CVE-2020-15249
要修補 CVE-2020-15249,請將受影響套件升級到下列已修補版本。
- —升級至 1.0.469 或更新版本
CVE-2020-15249 正在被利用嗎?
低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- >= 1.0.319, < 1.0.469
CVSS 分數
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