Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
showdoc/showdoc versions up to and including 2.9.8 are affected. The source describes a hardcoded salt in the user password hashing function, but gives few other details about how it can be exploited. No fixed version is listed. The source does not describe a workaround.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.3 | Medium | 3.0 | CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N | CNA (@huntrdev) |
- CISA KEV Not listed.
- EPSS 0.0046, the 40th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:33 UTC First seen by agentprime
- 31 Oct 2026, 14:33 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-8vh3-29mr-m9xg
- OSV: GHSA-8vh3-29mr-m9xg
- nvd.nist.gov/vuln/detail/CVE-2021-3680
- github.com/star7th/showdoc/commit/4b962c1740311e0d46775023b6acba39ad60e370
- github.com/star7th/showdoc
- github.com/star7th/showdoc/blob/fd1740234a12804b45af9cac3563567d83ba414d/server/Application/Home/Model/UserModel.class.php#L20
- huntr.dev/bounties/76b49607-fba9-4100-9be7-cb459fe6cfe2