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TI-2021-02887 Aliases CVE-2021-3990GHSA-vrgh-5w3c-ggf8

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

Priority LOW 31CWE-338Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

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

Why it matters now

EPSS 0.00891 59th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed star7th/showdoc (star7th): 2.9.13showdoc/showdoc (Packagist): 2.9.13

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
star7thstar7th/showdocbefore 2.9.132.9.13Patch availableCNA
—showdoc/showdoc (Packagist)before 2.9.132.9.13Patch availableGHSA-vrgh-5w3c-ggf8
  • star7th/showdoc Vendorstar7th Affected before 2.9.13 Fixed in 2.9.13 Patch available CNA
  • showdoc/showdoc (Packagist) Vendor— Affected before 2.9.13 Fixed in 2.9.13 Patch available GHSA-vrgh-5w3c-ggf8

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:showdoc:showdoc:*:*:*:*:*:*:*:*before 2.9.13Vulnerablestar7th
  • cpe:2.3:a:showdoc:showdoc:*:*:*:*:*:*:*:* Versions before 2.9.13 Vulnerable ·star7th

Remediation

  • Fix · CNA star7th/showdoc (star7th) Fixed in 2.9.13
  • Fix · GHSA-vrgh-5w3c-ggf8 showdoc/showdoc (Packagist) Fixed in 2.9.13 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    star7th/showdoc 2.9.13

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3990
  2. 2026-10-03 Alias added: GHSA-vrgh-5w3c-ggf8

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2021-14768 Unrestricted File Upload in ShowDoc v2.9.5 allows remote attackers to execute arbitrary… CVSS 3.1CRITICAL 9.8
  • TI-2022-00287 SQL Injection in star7th/showdoc CVSS 3.1CRITICAL 9.8
  • TI-2021-18398 ShowDoc 2.8.3 ihas a file upload vulnerability, where attackers can use the vulnerability to obtain server permissions. CVSS 3.1CRITICAL 9.8
  • TI-2021-03036 Cross-Site Request Forgery (CSRF) in star7th/showdoc CVSS 3.1HIGH 8.8
  • TI-2021-02908 Cross-Site Request Forgery (CSRF) in star7th/showdoc CVSS 3.1HIGH 8.8
  • TI-2022-00334 Unrestricted Upload of File with Dangerous Type in star7th/showdoc CVSS 3.1HIGH 7.8
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences