Description
OpnForm derives editable-submission secrets from sequential row identifiers using Hashids with an empty default salt, allowing unauthenticated attackers to compute hashes for any submission. Attackers can read other respondents- full submission data through the submission-fetch endpoint or overwrite submissions by supplying predicted hashes to the answer endpoint.
CVSS 9.1EPSS 0.305%Risk 0.93
View source- Published
- 2026-08-17 21:16:49
- Affected versions
- unknown
- Type
- Web application
- Last modified
- 2026-08-18 15:17:13
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N