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Vulnerability details: VCID-eq7f-n3g5-s3hu
Vulnerability ID VCID-eq7f-n3g5-s3hu
Aliases CVE-2021-20681
GHSA-24p5-x9f9-vvpx
Summary Cross-site Scripting Improper neutralization of JavaScript input in the page editing function of baserCMS allows remote authenticated attackers to inject an arbitrary script via unspecified vectors.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00203 https://api.first.org/data/v1/epss?cve=CVE-2021-20681
cvssv3.1 5.4 https://basercms.net/security/JVN64869876
generic_textual MODERATE https://basercms.net/security/JVN64869876
cvssv3.1 5.4 https://jvn.jp/en/jp/JVN64869876/index.html
generic_textual MODERATE https://jvn.jp/en/jp/JVN64869876/index.html
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2021-20681
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-20681
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-20681
https://basercms.net/security/JVN64869876
https://jvn.jp/en/jp/JVN64869876/index.html
CVE-2021-20681 https://nvd.nist.gov/vuln/detail/CVE-2021-20681
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://basercms.net/security/JVN64869876
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:L/UI:R/S:C/C:L/I:L/A:N Found at https://jvn.jp/en/jp/JVN64869876/index.html
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:L/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20681
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 0.42327
EPSS Score 0.00203
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:20:57.423528+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/baserproject/basercms/CVE-2021-20681.yml 38.6.0