CVE-2021-3678 json
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in star7th/showdoc
published 2021-08-04 5 y ago modified 2026-06-17 4 mo ago also GHSA-j85q-whc9-g4p9 , EUVD-2021-2082
- cvss
- 7.5
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
Summary
showdoc is vulnerable to Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Patch / fix
Exploit prediction
1.06% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
| GitHub | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | showdoc/showdoc | <2.9.8 |
2.9.8 |
Affected products
- star7th star7th/showdoc
Classification
- Weakness
-
- CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
References
-
github.com
/star7th/showdoc/commit/4b962c1740311e0d46775023b6acba39ad60e370
web, patch, third-party-advisory
-
huntr.dev
/bounties/f9a9defd-29ea-4442-b692-ff1512813de4
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-3678
advisory
Sources
- CVE List CVE-2021-3678
- GitHub Advisory GHSA-j85q-whc9-g4p9
- NVD CVE-2021-3678
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.