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Vulnerability details: VCID-fa1j-6bzu-a3a5
Vulnerability ID VCID-fa1j-6bzu-a3a5
Aliases CVE-2021-4017
GHSA-f77h-m9w2-vvg2
Summary showdoc is vulnerable to Cross-Site Request Forgery (CSRF)
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-352 Cross-Site Request Forgery (CSRF)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00142 https://api.first.org/data/v1/epss?cve=CVE-2021-4017
epss 0.00142 https://api.first.org/data/v1/epss?cve=CVE-2021-4017
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-f77h-m9w2-vvg2
cvssv3.1 8.8 https://github.com/star7th/showdoc
generic_textual HIGH https://github.com/star7th/showdoc
cvssv3.1 8.8 https://github.com/star7th/showdoc/commit/654e871a3923e79076818a9a03533fe88222c871
generic_textual HIGH https://github.com/star7th/showdoc/commit/654e871a3923e79076818a9a03533fe88222c871
cvssv3.1 8.8 https://huntr.dev/bounties/1d8439e8-b3f7-40f8-8b30-f9cb05ff2bcd
generic_textual HIGH https://huntr.dev/bounties/1d8439e8-b3f7-40f8-8b30-f9cb05ff2bcd
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-4017
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-4017
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-4017
https://github.com/star7th/showdoc
https://github.com/star7th/showdoc/commit/654e871a3923e79076818a9a03533fe88222c871
https://huntr.dev/bounties/1d8439e8-b3f7-40f8-8b30-f9cb05ff2bcd
CVE-2021-4017 https://nvd.nist.gov/vuln/detail/CVE-2021-4017
GHSA-f77h-m9w2-vvg2 https://github.com/advisories/GHSA-f77h-m9w2-vvg2
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/star7th/showdoc
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/star7th/showdoc/commit/654e871a3923e79076818a9a03533fe88222c871
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://huntr.dev/bounties/1d8439e8-b3f7-40f8-8b30-f9cb05ff2bcd
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-4017
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.34126
EPSS Score 0.00142
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:27:13.953705+00:00 GHSA Importer Import https://github.com/advisories/GHSA-f77h-m9w2-vvg2 38.6.0