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Vulnerability details: VCID-ktd3-z3en-ukc7
Vulnerability ID VCID-ktd3-z3en-ukc7
Aliases CVE-2024-28199
GHSA-242p-4v39-2v8g
Summary phlex is an open source framework for building object-oriented views in Ruby. There is a potential cross-site scripting (XSS) vulnerability that can be exploited via maliciously crafted user data. This was due to improper case-sensitivity in the code that was meant to prevent these attacks. If you render an `<a>` tag with an `href` attribute set to a user-provided link, that link could potentially execute JavaScript when clicked by another user. If you splat user-provided attributes when rendering any HTML tag, malicious event attributes could be included in the output, executing JavaScript when the events are triggered by another user. Patches are available on RubyGems for all 1.x minor versions. Users are advised to upgrade. Users unable to upgrade should consider configuring a content security policy that does not allow `unsafe-inline`.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
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
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.01541 https://api.first.org/data/v1/epss?cve=CVE-2024-28199
epss 0.01541 https://api.first.org/data/v1/epss?cve=CVE-2024-28199
cvssv3.1 7.1 https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
generic_textual HIGH https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
ssvc Track https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
cvssv3.1 7.1 https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline
generic_textual HIGH https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline
ssvc Track https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-242p-4v39-2v8g
cvssv3.1 7.1 https://github.com/phlex-ruby/phlex
generic_textual HIGH https://github.com/phlex-ruby/phlex
cvssv3.1 7.1 https://github.com/phlex-ruby/phlex/commit/aa50c604cdee1d0ce7ef068a4c66cbd5d43f96a1
generic_textual HIGH https://github.com/phlex-ruby/phlex/commit/aa50c604cdee1d0ce7ef068a4c66cbd5d43f96a1
ssvc Track https://github.com/phlex-ruby/phlex/commit/aa50c604cdee1d0ce7ef068a4c66cbd5d43f96a1
cvssv3 7.1 https://github.com/phlex-ruby/phlex/security/advisories/GHSA-242p-4v39-2v8g
cvssv3.1 7.1 https://github.com/phlex-ruby/phlex/security/advisories/GHSA-242p-4v39-2v8g
cvssv3.1_qr HIGH https://github.com/phlex-ruby/phlex/security/advisories/GHSA-242p-4v39-2v8g
generic_textual HIGH https://github.com/phlex-ruby/phlex/security/advisories/GHSA-242p-4v39-2v8g
ssvc Track https://github.com/phlex-ruby/phlex/security/advisories/GHSA-242p-4v39-2v8g
cvssv3.1 7.1 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/phlex/CVE-2024-28199.yml
generic_textual HIGH https://github.com/rubysec/ruby-advisory-db/blob/master/gems/phlex/CVE-2024-28199.yml
cvssv3.1 7.1 https://nvd.nist.gov/vuln/detail/CVE-2024-28199
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2024-28199
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2024-28199
https://github.com/phlex-ruby/phlex
aa50c604cdee1d0ce7ef068a4c66cbd5d43f96a1 https://github.com/phlex-ruby/phlex/commit/aa50c604cdee1d0ce7ef068a4c66cbd5d43f96a1
Content-Security-Policy https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
Content-Security-Policy#unsafe-inline https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline
CVE-2024-28199 https://nvd.nist.gov/vuln/detail/CVE-2024-28199
CVE-2024-28199.YML https://github.com/rubysec/ruby-advisory-db/blob/master/gems/phlex/CVE-2024-28199.yml
GHSA-242p-4v39-2v8g https://github.com/advisories/GHSA-242p-4v39-2v8g
GHSA-242p-4v39-2v8g https://github.com/phlex-ruby/phlex/security/advisories/GHSA-242p-4v39-2v8g
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N Found at https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-03-12T15:49:25Z/ Found at https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N Found at https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-03-12T15:49:25Z/ Found at https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N Found at https://github.com/phlex-ruby/phlex
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:L/A:N Found at https://github.com/phlex-ruby/phlex/commit/aa50c604cdee1d0ce7ef068a4c66cbd5d43f96a1
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-03-12T15:49:25Z/ Found at https://github.com/phlex-ruby/phlex/commit/aa50c604cdee1d0ce7ef068a4c66cbd5d43f96a1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N Found at https://github.com/phlex-ruby/phlex/security/advisories/GHSA-242p-4v39-2v8g
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-03-12T15:49:25Z/ Found at https://github.com/phlex-ruby/phlex/security/advisories/GHSA-242p-4v39-2v8g
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/phlex/CVE-2024-28199.yml
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:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2024-28199
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 0.81774
EPSS Score 0.01541
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-10T18:32:10.872706+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2024/28xxx/CVE-2024-28199.json 38.6.0