Description
SurveyKing before 1.13.0 contains a missing authorization vulnerability that allows unauthenticated attackers to download any stored file by id through GET /api/public/preview/{attachmentId}. Attackers who know or derive time-ordered snowflake file ids can bypass shared, owner, and project checks in FileServiceImpl.loadFile to read private survey attachments and respondent uploads.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| javahuang | SurveyKing | < 1.13.0 | 1.13.0 |
References
- https://hackmd.io/@hieuPenguinnn/surveyking-public-preview-unauth-file-read third-party-advisory
- https://github.com/javahuang/SurveyKing/blob/6e1fdd59f9b331ac90a26402ac86a002cc9155a9/server/api/src/main/java/cn/surveyking/server/api/SurveyApi.java#L99-L107 technical-description
- https://github.com/javahuang/SurveyKing/blob/6e1fdd59f9b331ac90a26402ac86a002cc9155a9/server/rdbms/src/main/java/cn/surveyking/server/impl/FileServiceImpl.java#L197-L228 technical-description
- https://github.com/javahuang/SurveyKing/commit/9489171d53e55ace2856a91af38034665c0064a4 patch
- https://github.com/javahuang/SurveyKing product
- VulnCheck Advisory: SurveyKing before 1.13.0 Unauthenticated File Download via /api/public/preview third-party-advisory