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Vulnerability details: VCID-xkf7-rwtr-9bas
Vulnerability ID VCID-xkf7-rwtr-9bas
Aliases CVE-2021-41252
GHSA-x7j7-qp7j-hw3q
Summary Cross-site scripting (XSS) from writer field content in the site frontend
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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 0.00785 https://api.first.org/data/v1/epss?cve=CVE-2021-41252
epss 0.00785 https://api.first.org/data/v1/epss?cve=CVE-2021-41252
epss 0.00785 https://api.first.org/data/v1/epss?cve=CVE-2021-41252
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-x7j7-qp7j-hw3q
cvssv3.1 5.4 https://github.com/getkirby/kirby
generic_textual MODERATE https://github.com/getkirby/kirby
cvssv3.1 5.4 https://github.com/getkirby/kirby/commit/25fc5c6b330442e6433c99befc688f3698c5d1fc
generic_textual MODERATE https://github.com/getkirby/kirby/commit/25fc5c6b330442e6433c99befc688f3698c5d1fc
cvssv3.1 5.4 https://github.com/getkirby/kirby/releases/tag/3.5.8
generic_textual MODERATE https://github.com/getkirby/kirby/releases/tag/3.5.8
cvssv3.1 5.4 https://github.com/getkirby/kirby/security/advisories/GHSA-x7j7-qp7j-hw3q
cvssv3.1_qr MODERATE https://github.com/getkirby/kirby/security/advisories/GHSA-x7j7-qp7j-hw3q
generic_textual MODERATE https://github.com/getkirby/kirby/security/advisories/GHSA-x7j7-qp7j-hw3q
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2021-41252
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-41252
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-41252
https://github.com/getkirby/kirby
https://github.com/getkirby/kirby/commit/25fc5c6b330442e6433c99befc688f3698c5d1fc
https://github.com/getkirby/kirby/releases/tag/3.5.8
CVE-2021-41252 https://nvd.nist.gov/vuln/detail/CVE-2021-41252
GHSA-x7j7-qp7j-hw3q https://github.com/advisories/GHSA-x7j7-qp7j-hw3q
GHSA-x7j7-qp7j-hw3q https://github.com/getkirby/kirby/security/advisories/GHSA-x7j7-qp7j-hw3q
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Found at https://github.com/getkirby/kirby
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:N/S:U/C:L/I:L/A:N Found at https://github.com/getkirby/kirby/commit/25fc5c6b330442e6433c99befc688f3698c5d1fc
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:N/S:U/C:L/I:L/A:N Found at https://github.com/getkirby/kirby/releases/tag/3.5.8
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:N/S:U/C:L/I:L/A:N Found at https://github.com/getkirby/kirby/security/advisories/GHSA-x7j7-qp7j-hw3q
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:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41252
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 0.74208
EPSS Score 0.00785
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:27:09.254913+00:00 GHSA Importer Import https://github.com/advisories/GHSA-x7j7-qp7j-hw3q 38.6.0