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Vulnerability details: VCID-5a8d-7jh7-tfev
Vulnerability ID VCID-5a8d-7jh7-tfev
Aliases CVE-2021-3989
GHSA-f545-vpwp-r9j7
Summary showdoc is vulnerable to URL Redirection to Untrusted Site
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
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 0.00207 https://api.first.org/data/v1/epss?cve=CVE-2021-3989
epss 0.00207 https://api.first.org/data/v1/epss?cve=CVE-2021-3989
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-f545-vpwp-r9j7
cvssv3.1 6.1 https://github.com/star7th/showdoc
generic_textual MODERATE https://github.com/star7th/showdoc
cvssv3.1 6.1 https://github.com/star7th/showdoc/commit/335afc7ed6d6627c3d0434aa9acc168c77117614
generic_textual MODERATE https://github.com/star7th/showdoc/commit/335afc7ed6d6627c3d0434aa9acc168c77117614
cvssv3.1 6.1 https://huntr.dev/bounties/ffc61eff-efea-42c5-92c2-e043fdf904d5
generic_textual MODERATE https://huntr.dev/bounties/ffc61eff-efea-42c5-92c2-e043fdf904d5
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2021-3989
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-3989
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-3989
https://github.com/star7th/showdoc
https://github.com/star7th/showdoc/commit/335afc7ed6d6627c3d0434aa9acc168c77117614
https://huntr.dev/bounties/ffc61eff-efea-42c5-92c2-e043fdf904d5
CVE-2021-3989 https://nvd.nist.gov/vuln/detail/CVE-2021-3989
GHSA-f545-vpwp-r9j7 https://github.com/advisories/GHSA-f545-vpwp-r9j7
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N 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:C/C:L/I:L/A:N Found at https://github.com/star7th/showdoc/commit/335afc7ed6d6627c3d0434aa9acc168c77117614
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:C/C:L/I:L/A:N Found at https://huntr.dev/bounties/ffc61eff-efea-42c5-92c2-e043fdf904d5
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:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3989
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 0.43172
EPSS Score 0.00207
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:27:14.056479+00:00 GHSA Importer Import https://github.com/advisories/GHSA-f545-vpwp-r9j7 38.6.0