What’s Vulnerable › Vulnerabilities

CVE-2021-3678: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in star7th/showdoc

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-04 · updated 2026-06-17
• Weakness: CWE-338

Description

showdoc is vulnerable to Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Affected products

• star7th/showdoc: before 2.9.8 — fixed in 2.9.8

How to fix

Upgrade to a fixed version: star7th/showdoc 2.9.8. Check the vendor advisory for mitigations.

References

• https://github.com/star7th/showdoc/commit/4b962c1740311e0d46775023b6acba39ad60e370
• https://huntr.dev/bounties/f9a9defd-29ea-4442-b692-ff1512813de4
• https://github.com/star7th/showdoc/commit/4b962c1740311e0d46775023b6acba39ad60e370
• https://huntr.dev/bounties/f9a9defd-29ea-4442-b692-ff1512813de4

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