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Vulnerability details: VCID-hm48-j28u-x7g8
Vulnerability ID VCID-hm48-j28u-x7g8
Aliases CVE-2021-29460
GHSA-qgp4-5qx6-548g
Summary
Status Published
Exploitability 2.0
Weighted Severity 8.0
Risk 10.0
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
cvssv3.1 7.6 http://packetstormsecurity.com/files/162359/Kirby-CMS-3.5.3.1-Cross-Site-Scripting.html
generic_textual HIGH http://packetstormsecurity.com/files/162359/Kirby-CMS-3.5.3.1-Cross-Site-Scripting.html
epss 0.0112 https://api.first.org/data/v1/epss?cve=CVE-2021-29460
epss 0.0112 https://api.first.org/data/v1/epss?cve=CVE-2021-29460
epss 0.0112 https://api.first.org/data/v1/epss?cve=CVE-2021-29460
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-qgp4-5qx6-548g
cvssv3.1 7.6 https://github.com/getkirby/kirby/releases/tag/3.5.4
generic_textual HIGH https://github.com/getkirby/kirby/releases/tag/3.5.4
cvssv3.1 7.6 https://github.com/getkirby/kirby/security/advisories/GHSA-qgp4-5qx6-548g
cvssv3.1_qr HIGH https://github.com/getkirby/kirby/security/advisories/GHSA-qgp4-5qx6-548g
generic_textual HIGH https://github.com/getkirby/kirby/security/advisories/GHSA-qgp4-5qx6-548g
cvssv3.1 7.6 https://nvd.nist.gov/vuln/detail/CVE-2021-29460
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-29460
Reference id Reference type URL
http://packetstormsecurity.com/files/162359/Kirby-CMS-3.5.3.1-Cross-Site-Scripting.html
https://api.first.org/data/v1/epss?cve=CVE-2021-29460
https://github.com/getkirby/kirby/releases/tag/3.5.4
https://github.com/getkirby/kirby/security/advisories/GHSA-qgp4-5qx6-548g
https://nvd.nist.gov/vuln/detail/CVE-2021-29460
CVE-2021-29460 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/49808.txt
GHSA-qgp4-5qx6-548g https://github.com/advisories/GHSA-qgp4-5qx6-548g
Data source Exploit-DB
Date added April 28, 2021
Description Kirby CMS 3.5.3.1 - 'file' Cross-Site Scripting (XSS)
Ransomware campaign use Unknown
Source publication date April 28, 2021
Exploit type webapps
Platform php
Source update date April 28, 2021
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N Found at http://packetstormsecurity.com/files/162359/Kirby-CMS-3.5.3.1-Cross-Site-Scripting.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:H/I:L/A:N Found at https://github.com/getkirby/kirby/releases/tag/3.5.4
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:H/I:L/A:N Found at https://github.com/getkirby/kirby/security/advisories/GHSA-qgp4-5qx6-548g
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:H/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29460
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 0.7865
EPSS Score 0.0112
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-12T02:00:15.933368+00:00 EPSS Importer Import https://epss.cyentia.com/epss_scores-current.csv.gz 38.6.0